Answer: Given in question : Resistance = constant We know that V = IR When resistance, R is constant, V is proportional to I Therefore, when V is halved, I also becomes half.
Answer: According to the law of series combination of resistances, the combined resistance of any number of resistances connected in series equals the individual resistances.
Answer: Insulators are materials with an infinitely high electrical resistance.
Electric resistance is a physical quantity with an ohm unit.
Electrical resistance is measured in Ohms. The ohm symbol is as follows:Ω
Answer The electric heating devices with resistors that control the flow of electricity are as follows: a) Iron (electric) c) Heater for the room c) Thermostat d) Oven (electric)
Answer Given, 220 volts 360W = Pmin 840 W (Pmax) When the heat is turned down to a bare minimum, VI = Pmin I220 = 360 1.63 amps I V/I = R R = 1.63/1.63/1.63/1.63/1.63/1.63 134.96 ohms R = 134.96...
Answer More heat is obtained each minute when the heating resistances are connected in series. This is due to the fact that the overall resistance in a series configuration is higher than the total...
Ohm's law is a law that connects the current in a conductor to the potential difference between its ends. The conductor is the type of metal which allows the electrical current to flow through it.
Answer a) The behaviour of the filament wire in a light bulb differs from the behaviour of the other wires in the circuit, since the filament wire becomes white hot while the other wires do not. b)...
Answer a) An electric iron's heating element is S, which has a high resistance. This is a nichrome substance. b) An electric iron's connecting wires are Q because they have a low resistance. Copper...
Answer: Given the information in the question: Charge moved, Q = 20C Time is taken, t = 1s To find, Current, I We know that the current is calculated as follows: I = Q/t We get by substituting the...
Answer c) four times is the correct answer. When the current flowing through a fixed resistor is cut in half, the heat generated in the resistor increases to four times its original value.
Answer b) 2500°C is the correct answer.
Answer B) infrared rays is the right answer. Infrared rays are produced by the electric power consumed by a filament type light bulb.
Answer b) thick and short is the correct answer. When a fuse wire is thick, there are more electrons available, which is not a desirable feature of a fuse wire.
Answer b) x z y2 is the correct answer.
Answer c) nichrome is the correct answer. Nichrome is used to make the components of electric heating equipment.
Answer The correct answer is d) present heating impact. The working principle of an electric fuse is the heating effect of current.
Answer c) four times is the correct answer. When the current in an electric kettle is doubled, the heat produced increases by four times.
Answer The correct answer is c) present magnitude. The heat generated by an electric current travelling through a fixed resistor is proportional to the square of the current magnitude.
Answer: An object's electrical resistance is a measure of its resistance to the flow of electric current. Electrical resistance is measured in Ohms. The ohm symbol is as follows: Ω
Answer Given, 100J = H T = 1 second 4 ohms R = 4 ohms R = 4 ohm We are aware of this. I2RT = H I2 x 4 x 1 = 100 I2 = 100/4 5 amps = I IR = V 5 x 4 = V V equals 20
Answer Given, R equals 25 V Equals 12 volts T = 60 seconds ? = H IR = V I=12/25 I=0.48 amp We are aware of this. H=I^2 RT H=345.6J
Answer Given, 8 ohm R Equals 8 ohm R = 8 ohm 15 amps = I T = 1 second We are aware of this. I2RT = H 1800 J/s H
Answer Given, R = 200 ohms ohms ohms ohms 2.5 amps I T = 1 second We are aware of this. I2RT = H 1250 J/s H
Answer: Ohm's law is a law that connects the current in a conductor to the potential difference between its ends.
Answer Given, 4 amps = I T = 10 minutes = 600 seconds 2.88 104 J H = 2.88 104 J H = 2.88 104 J H = 2.88 104 a) We are aware of this. I2RT = H 42600R = 28800R...
Answer Because tungsten has an extremely high melting point, it is utilised to make electric bulb filaments. This means that the filament will continue to burn hot but will not melt. Tungsten is...
Answer The three elements that influence the amount of heat created by an electric current are as follows: a) The amount of heat produced is proportional to the square of the current. b) The amount...
Answer Electrical resistivity is a measurement of how well a substance resists the passage of electricity, whereas conductivity is a measure of how easily electricity flows. The heater's heating...
Answer Filament-type electric bulbs are inefficient because they waste the majority of their electricity as heat, with only a small portion converted to light.
Answer The two gases that are used to fill filament type electric light bulbs are as follows: Argon (a) Nitrogen (b)
Answer The two devices that work on the heating effect of an electric current are as follows: a) An electric space warmer b) Fuse (electric)
Answer An electric fuse works by utilising the heating impact of current.
Answer An electric light bulb makes use of the current's heating effect.
Answer The two impacts of electric current are as follows: a) Effect of heating b) Magnetic attraction
Answer When the current going through a conductor is doubled, the amount of heat produced quadruples. This is due to the fact that the amount of heat produced is proportional to the square of the...
Answer: The amount of heat created by a current flowing through a fixed resistance wire is exactly proportional to the amount of current I flowing through the wire.
Answer: a) In the circuit schematic, the symbol above denotes variable resistance. b) In the circuit schematic, the symbol above represents a closed plug key.
Answer: The ammeter is connected in series in an electric circuit, while the voltmeter is connected in parallel.
Answer: The ammeter is linked in series with the voltmeter in place of the ammeter.
Answer: a)This table shows how many milliamperes there are in a single ampere: 1 amp = 103 milliamp b) The following is of the microamperes that are contained inside one ampere: 1 amp = 106 micro...
Answer: The unit of electric current is ampere. Current is denied when the rate at which charge flows through the conductor is less than a certain threshold.
Answer: The correct is 1A = 1C/s Current is denied when the rate at which charge flows through the conductor is less than a certain threshold. As a result, the right relationship is I=q/t, where q...
Answer: a) Traditional current is carried from the positive terminal of the batter to its negative terminal in the outer circuit. b) In a battery, electrons move from the negative terminal to the...
Answer: An electric current in a metallic conductor is made up of electrons, which are the particles that make up the current.
Answer: When the light is turned on, there is an increase in the flow of electrons across the wires.
Answer: Electric current is the term used to describe the passage of charge. A conductor's electric current can be defined as the rate at which negative charges flow through it. Alternately, it can...
Answer: The physical quantity coulomb/second is referred to as the ampere in the scientific community. It is defined as the elementary charge e, which has a value of 1.602 × 10-19 and is expressed...
Answer: Copper atoms possess electrons, as do rubber atoms, however copper conducts electricity while rubber does not because copper contains unbound electrons held loosely together by the nucleus...
Answer: a) As an example, if three cells, each having a voltage of 2 volts, are connected in series for the purpose of building a battery, the total potential difference between the terminals of the...
electrons b) 
electrons c) 
electrons d) 
electronsAnswer: The correct option is d) 6.25×1018 electrons There are 6.25×1018 electrons in a one-coulomb charge. A coulomb is a charge carried by an ampere per the second current. 1C=1A * 1s We know...
Answer: It is c) Volt that is the correct answer. For measuring the potential difference, the volt is the unit of measurement.
Answer: The correct choice is d) Coulomb's law. Coulomb is a unit of measurement for electric charge that is used in science.
Answer: It is d) Voltmeter that is the correct answer. A voltmeter is a gadget that is used to measure the difference between two potentials.
Answer: It is b) Potential difference that is the correct answer. The potential difference between two places in an electric circuit is a measure of the amount of work required to move a unit charge...
Answer: In order to function, the resistance of the voltmeter must be high since it must draw only a small amount of current from an electric circuit.
c) Given, Work done = 250J Charge moved = 20C To find Potential difference We know that potential difference is given as Potential difference = (Work done)/(Charge moved) p.d = (250)/(20) = 12.5...
Answer: a) The potential difference between two points is defined as the amount of work required to move a unit positive charge from one point to the other point. b) A 1-volt difference in potential...
Answer: a) Voltmeter: a device that helps to measure the potential difference across a conductor. b) Given in question: Potential difference = 12V Charge moved = 1C To find, Work done We know that...
Answer: a) The relation between potential difference, work done, and charge moved: Potential difference = (Work done)/(Charge moved) b) Given information in question: V1 = 220V V2 = 230V Charge...
Answer: The electric potential at a given point is defined as the amount of work required to move a unit positive charge from infinity to a specific point in space. The unit of electric potential is...
Answer: Conductors are defined as the materials that allow an electric current to flow across their surfaces. Almost all metals are examples of conductors, including gold and silver. Insulators are...
Answer: Conductors are defined as the materials that allow electric current to flow across their surfaces. Almost all metals are examples of conductors, including gold and silver. The following are...
Answer: a) Volts, voltmeter, parallel b) Conductor, insulator
Answer: A coulomb is the amount of charge produced by a one-ampere current flowing for one second.
Answer: The unit of electric charge is the coulomb (coulomb). In electrical engineering, the term "coulomb" refers to the charge that is transferred with the help of a constant current of one ampere...
Answer: Given, Potential difference = 12V Charge moved = 2C To find, Work done We know that the work done is given as Work done = p.d × charge moved = 12 × 2 = 24J So, to move a 2C charge with a 12V...
Answer: The SI unit of potential difference is volts. It is a potential difference that resists a resistance of one ohm through a current of one ampere.
Answer: Given the information in question: Potential difference = 1V Charge to be moved = 1C To find, Work done We know that the work done is given as: Work done = Potential difference × Charge...
Answer: In order to move one unit of positive charge from infinity to a specific point, the electric potential at that point must be one volt, which means that one joule of work must be done.
Answer: a).) p.d. stand for potential difference b) voltmeter is a device which used to measure potential difference
Answer: The joule/coulomb is also known as volt. The SI unit of electric potential is the volt. The potential difference between two points of a current-carrying wire of 1 ampere is represented by...
a. Tungsten has a high resistance and melting point. It doesn't burn easily when heated because of its characteristic. Electric bulbs generate a lot of heat. As a result, tungsten is a popular metal...
The following formula can be used to compute the rate at which heat develops in the heater. I2 R = P We obtain by substituting the numbers in the equation. P = (15A) 2 × 8 Ω = 1800 J/s Heat is...
The equation gives the amount of energy consumed by electrical appliances. H = Pt, where P is the appliance's power and t is the time. The energy consumed by a TV with a power rating of 250 W may be...
The voltage across both bulbs will be the same because they are linked in parallel. The current drawn by a 100 W bulb may be calculated as follows: P/V = I We obtain by substituting the numbers in...
(i) Because the resistors 1 and 2 are linked in series and the potential difference is 6 V, their equivalent resistance is 1 + 2 = 3. Using Ohm's law, the current in the circuit may be computed. As...
Case1 :When coils are utilised individually in case I We can calculate the current going through each coil using Ohm's law : When each resistor is utilised independently, 9.166 A of current passes...
The bulb's resistance may be estimated using the formula. V2/R1 = P1 V2/P1 = R1 We obtain by substituting the values. x=110 As a result, 110 lights may be linked in series.
When all three resistors are connected in series, the equivalent resistance is 6 + 6 + 6 =18, which is not the required number. Similarly, if all three resistors are connected in parallel, the...
Let's call the needed number of resistors 'x.' The parallel combination of resistors R's equivalent resistance is given by Using ohms law, find the no of resisters. A total of four resistors are...
There is no present division in a series link. All of the resistors have the same current flowing through them. Ohm's law is used to compute the amount of current flowing across the resistors. But...
Using Ohm's Law, the value of the resistance may be determined as follows: R=4.8k ohms
The IV characteristic is a graph that shows the relationship between voltage and current. On the y-axis, the current is shown, while the voltage is represented on the x-axis. The table below shows...
Ω m. What will be the length of this wire to make its resistance 10 Ω? How much does the resistance change if the diameter is doubled?The resistance of a copper wire with a length in metres and a cross-sectional area of metre sq. is calculated using the formula. R=\(\rho\)\/A On substituting the values we get: The wire is 122.72...
The voltmeter should be connected in parallel between the two locations to measure the voltage between them.
(c) 1:4
(d) 25 W Step 1: Using the above ratings, determine the bulb's resistance. Bulb rating: P=100W, V=220V Power, $P=\frac{V^{2}}{R}$$\Rightarrow \mathrm{R}=\frac{\mathrm{V}^{2}}{\mathrm{P}}=\frac{220...
/R(b) \(I{{R}^{2}}\)
d) 25 We know that. $\text { Resistance } \mathrm{R}=\rho \frac{\ell}{\mathrm{A}}$ Because R is proportional to the length of the wire.As a result, after breaking the wire into five sections, the...
The equation may be used to compute the motor's power. VI = P We obtain by substituting the numbers in the preceding equation. 220 V x 5 A = 1100 W The equation may be used to calculate the motor's...
Electric power is the pace at which electrical energy is used by electric equipment. As a result, the power of an appliance is defined as the rate at which energy is provided by a current.
The Joule's law of heating, which is provided by the equation, may be used to compute the quantity of heat created. VIt = H We obtain by substituting the variables in the preceding equation: H =...
Joule's law may be used to calculate the amount of heat produced: VIt = H where, V = 50 V is the voltage. I is the current. 1 hour Equals 3600 seconds, where t is the time in seconds. The following...
The heating element of an electric heater is composed of a high-resistance alloy. When the current passes through the heating element, it becomes overheated and glows red. The cord is generally...
(a) When the four resistors are wired in series, their total resistance equals the sum of their individual resistances, which is the greatest. 4 + 8 + 12 + 24 = 48 is the total equivalent resistance...
(a) The circuit schematic below demonstrates how three resistors are connected. It is clear from the circuit above that 3 and 6 are linked in parallel. As a result, their comparable resistance is 2...
There is no voltage split among the electrical devices when they are linked in parallel. The supply voltage is equal to the potential difference between the devices. The effective resistance of the...
A circuit diagram may be used to demonstrate the electric lamp, toaster, and water filter linked in parallel to a 220 V source: The resistors' equivalent resistance may be computed as follows:...
and 
, (b) 1 , 
, and .The comparable resistance is provided by when 1 and \({{10}^{6}}\) ohms are linked in parallel. Thus, the equivalent resistance is 1 \(\ohm\) When 1 is linked in parallel with \({{10}^{3}}\) and...
resistor. What would be the readings in the ammeter and the voltmeter?To measure the potential difference, an ammeter should always be linked in series with resistors, while a voltmeter should be connected in parallel with the resistor, as illustrated in the diagram...
resistor, an 8 resistor, and a 12 resistor, and a plug key, all connected in series.A battery with three 2 V cells equals a battery with a potential of 6 V. Three resistors with resistances of 12 ohms, 8 ohms, and 5 ohms are connected in series with a battery with a potential of 6...
a. Iron is a better conductor than mercury because mercury's resistivity is higher than that of iron. b. Silver is the best conductor of all the materials included in the table because its...
Because of its high resistivity, an alloy's melting point is significantly greater than that of a pure metal. Alloys do not melt easily at high temperatures. As a result, alloys are found in heating...
Ohm's Law may be used to calculate the change in current passing through an electrical component. The current, according to Ohm's Law, is given by V/R = I The potential difference is now cut in half...
The equation for resistance is: R=\(\rho \)I/A where, is the resistivity of the wire's substance, l is the wire's length. A is the cross-sectional area of the wire. The resistance is inversely...
The conductor's resistance is determined by the following factors: a. The conductor's temperature b. The conductor's cross-sectional area c. The conductor's length d. The conductor's material...
We know that the equation gives us the potential difference between two locations. W/Q = V, where W denotes the amount of effort required to move the charge from one location to another. The charge...
The potential difference between two points is 1 V when 1 J of effort is done to transfer a charge of 1 C from one point to another.
One of the devices that helps to maintain a potential difference across a conductor is a battery, which consists of one or more electric cells.
The charge of an electron is equal to \(1.6\times {{10}^{-19}}\) C. Using charge quantization as a guide, Q = nqe, where n denotes the number of electrons and qe denotes an electron's charge. The...
The unit of current is ampere. Ampere is defined by the flow of one coulomb of charge per second.
An electric circuit is a continuous closed route made up of electric components through which an electric current travels. The following components make up a basic circuit: (a) Conductors (b)...