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Magnetic Effects of Electric Current
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31/07/2021 12:24 pm
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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 fields were reversed simultaneously.
(b) In what ways can a motor be made more powerful?
1 Answer
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31/07/2021 12:25 pm
(a) (i) Direction of rotation would be reversed.
(ii) Direction of rotation would be reversed.
(iii) Direction of the rotation would remain unchanged.
(b) Motor can be made more powerful by winding the coil on a soft iron core of by increasing the number of turns of the coil.