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Science CBSE Homework Assignments
Class 10
Magnetic effects of electric current
Force on a current carrying conductor & Domestic circuits
2.
Exercise on Electric motor and generator
Task:
2
m.
Select the appropriate answer
:
1
.
Commercial electric motors do not use __________.
effectively large number of turns of conducting wire in the current carrying coil
a soft iron core on which the coil is wound
a permanent magnet to rotate the armature
an electromagnet to rotate the armature
2
.
The frequency of electricity produced by AC generator in india is equal to __________.
0 Hz
100 Hz
200 Hz
50 Hz
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