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a) State what would happen to the direction of rotation of a motor if: i) the current were reversed ii) the magnetic field were reversed iii) both current and magnetic field were reversed simultaneously b) In what ways can a motor be made more powerful?
a) State what would happen to the direction of rotation of a motor if:
i) the current were reversed
ii) the magnetic field were reversed
iii) both current and magnetic field were reversed simultaneously
b) In what ways can a motor be made more powerful?
CBSE | Class 10 | Lakhmir Singh | Magnetic Effects of Electric Current | Physics
a) State what would happen to the direction of rotation of a motor if:
i) the current were reversed
ii) the magnetic field were reversed
iii) both current and magnetic field were reversed simultaneously
b) In what ways can a motor be made more powerful?

Answer:

a) i. As a result of reversing the current, the direction of rotation would be reversed. a) I If the current is reversed, the direction of rotation would be reversed.

ii. It should be noted that even if the magnetic field were to be reversed, the direction of rotation would stay intact.

iii. It is also possible that if both the current and the magnetic field were reversed simultaneously, the direction of rotation would stay unaltered.

b) In order to increase the power of a motor, it is necessary to wind the coil onto a soft iron core and increase the number of turns in the coil.

i

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