- ARemains steady
- BDecreases
- CIncreases
- DEither (B) or (C)
Explanation:
As per Faradays law, EMF is always directly proportional to the rate of change of magnetic flux. Therefore, electromagnetic induction takes place whenever the magnetic flux passing through the object changes.
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Two cells, e.m.f. of each is E and internal resistance r are connected in parallel between the resistance R. The maximum energy given to the resistor will be, only when
|
(a) R = r/2 |
(b) R = r |
(c) R = 2r |
(d) R = 0 |
Two parallel wires in free space are 10 cm apart and each carries a current of 10 A in the same direction. The force one wire exerts on the other per metre of length is
|
(a) 2 |
(b) 2 |
|
(c) 2 |
(d) 2 |
To measure which of the following, is a tangent galvanometer used
| (a) Charge | (b) Angle | (c) Current | (d) Magnetic intensity |