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State whether the following statements are true or false: a) A wire with a green insulation is usually the live wire b) A miniature circuit breaker (MCB) works on the heating effect of current
State whether the following statements are true or false: a) A wire with a green insulation is usually the live wire b) A miniature circuit breaker (MCB) works on the heating effect of current
CBSE | Class 10 | Lakhmir Singh | Magnetic Effects of Electric Current | Physics
State whether the following statements are true or false: a) A wire with a green insulation is usually the live wire b) A miniature circuit breaker (MCB) works on the heating effect of current

Answer:

a) False

Explanation
The electric power line enters our house via three wires: live, neutral, and earth. The first two transport electricity from the power plant, while the third is earthed by a metal wire called an “Earth Wire.”

b) False

Explanation
MCBs work on the magnetic effect of electricity.
In MCB, the incoming terminal is connected to the output screw terminal through a solenoid coil and a bimetallic strip. All parts are linked in series. MCB normally operates as a switch. The actuator knob can switch on or off the MCB.

i

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