- A[L T A].
- B[L-1 T A].
- C[L-1 T-1 A-1].
- DNone.
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When a magnet is pushed in and out of a circular coil C connected to a very sensitive galvanometer G as shown in the adjoining diagram with a frequency v, then

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(a) Constant deflection is observed in the galvanometer |
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(b) Visible small oscillations will be observed in the galvanometer if v is about 50 Hz |
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(c) Oscillations in the deflection will be observed clearly if v = 1 or 2 Hz |
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(d) No variation in the deflection will be seen if v = 1 or 2 Hz |
Complete the reaction ![]()
|
(a) |
(b) |
(c) |
(d) |
Half life of a radioactive substance is T. The time taken for all the nuclei to disintegrate will be
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(a) 2T |
(b) T2 |
(c) 4T |
(d) Uncertain |
Magnification of an optical instrument is expressed in:
If a dielectric substance is introduced between the plates of a charged air-gap capacitor. The energy of the capacitor will
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(a) Increase |
(b) Decrease |
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(c) Remain unchanged |
(d) First decrease and then increase |
An example of a diamagnetic substance is
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(a) Aluminium |
(b) Copper |
(c) Iron |
(d) Nickel |