Physics
Grade-10
Easy
Question
Which one of the following can produce maximum induced emf?
- 50-ampere dc
- 50 ampere 50 Hz ac
- 50 ampere 500 Hz ac
- 100 ampere dc
Hint:
Induced emf e= L
, Thus, higher the frequency, greater will be .
The correct answer is: 50 ampere 500 Hz ac
The alternating current of 50 amperes and 500 Hz produces the maximum rate of induced emf.
- The frequency of change in current creates a change in the rate of the electromagnetic field.
- The alternating current continuously changes the rate of the electromagnetic field.
- Induced emf e= L, which means higher the frequency, greater will be .
- Thus, the rate of inducing electromagnetic field becomes maximum in the case of 50 amperes and 500 Hz ac.
, which means higher the frequency, greater will be .Related Questions to study
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