Double Strength
Posted March 11, 2009
By admin
Which one of the following changes would not double the emf produced by the generator?
An electric generator develops 60 V at a certain operating condition.
Which one of the following changes would not double the emf produced by the generator?
a) double the strength of the magnets
b) turn it twice as fast
c) reduce the resistive load by half
d) double the number of loops in its coil
Correct answer is c). Reducing the resistance will increase the current (up to a point), but not the voltage. All the other changes would increase the voltage generated.
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