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प्रश्न
- Describe briefly one way producing an induced e.m.f?
- State one factor that determines the magnitude of induced e.m.f. in part (a) above.
- What factor determines the direction of induced e.m.f. in part (a) above?
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उत्तर
- A DYNAMO, which is a coil that moves constantly in a magnetic field, can generate an induced current.
- Magnitude of induced e.m.f depend upon:
- The change in the magnetic flux.
- The time in which the magnetic flux changes.
- The direction of induced e.m.f depends on Fleming's right hand rule and Lenz's law.
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संबंधित प्रश्न
In which of the following case does the electromagnetic induction occur?
A conductor is moved in a varying magnetic field. Name the law which determines the direction of current induced in the conductor.
The instantaneous magnetic flux in a circuit is `phi=4t^2-4t+1`. The total resistance of circuit is 15 Ω. At t = 2s, the induced current in circuit is ____________.
A coil of 25 turns is pulled in 0.05 s between the poles of a magnet, where its area includes `21 xx106-6 "Wb" "to" 1 xx 10^-6 "Wb"`. The average e.m.f. is ______.
Magnetic flux passing through a coil is initially 6 x 10-4 Wb. It reduces to 10 % of its original value in 't' second. If the e.m.f. induced is 0.54 mV then 't' in second is ____________.
A.C generator works on the principle of ____________.
A D.C generator works on the principle of ____________.
The laws of induction were given by ______.
Name the principle of AC generator.
