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Chapter 15 - Electromagnetic Induction - 9
1.
The armature of a generator always traces an anagle 0
o
to 90
o
along the plane of a magnet
a) True
b) False
2.
The current in the motor increases with the decrease in its back emf.
a) True
b) False
3.
In Pakistan the electric power is transmitted at 220V for domestic use with the help of step down transformers.
a) True
b) False
4.
When the motor just starts up, back emf = 0
a) True
b) False
5.
An overloaded motor draws minimum current.
a) True
b) False
6.
Lenz’s law is used to find the direction of induced current.
a) False
b) True
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