- AAmperes law
- BLenz's law
- CFaradays law
- Dcoulombs law
Explanation:
Alternative current generator is based on Faraday's Law. Faraday's Law states that when the magnetic flux linking a circuit changes,an emf is induced in the circuit proportional to the rate of change of flux linkage.
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The frequency and work function of an incident photon are n and
. If n0 is the threshold frequency then necessary condition for the emission of photo electron is
|
(a) |
(b) v = |
(c) |
(d) None of these |

The frequency response curve of RC coupled amplifier is shown in figure. The band width of the amplifier will be

|
(a) |
(b) |
(c) |
(d) |
A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x > b is
|
(a) qb B/m |
(b) q(b – a) B/m |
(c) qaB/m |
(d) q(b + a)B/2m |
A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The "Watt-hour" efficiency of the battery is
|
(a) 82.5% |
(b) 80 % |
(c) 90% |
(d) 87.5% |