MCQ
A current carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon:
- AShape of the loop.
- BArea of the loop.
- CValue of the current.
- DMagnetic field.
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In the figure, three capacitors each of capacitance 6 pF are connected in series. The total capacitance of the combination will be

|
(a) 9 |
(b) 6 |
(c) 3 |
(d) 2 |
If a change in current of 0.01 A in one coil produces a change in magnetic flux of 1.2
in the other coil, then the mutual inductance of the two coils in henries is
|
(a) 0 |
(b) 0.5 |
(c) 1.2 |
(d) 3 |
If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of
|
(a) Doppler's effect |
(b) Interference |
(c) Diffraction |
(d) None of these |