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Magnetic Effects of Electric Current
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07/12/2020 5:10 pm
Topic starter
Commercial electric motors do not use
(a) an electromagnet to rotate the armature
(b) effectively large number of turns of conducting wire in the current carrying coil
(c) a permanent magnet to rotate the armature
(d) a soft iron core on which the coil is wound
1 Answer
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07/12/2020 5:11 pm
(c) a permanent magnet to rotate the armature
Explanation:
Using electromagnet, the magnetic field strength further increase by increasing the current. Hence it will enhance the power of electric.