- AEnergy.
- BCharge.
- CMomentum.
- DBoth energy and charge.
Explanation:
The Kirchoff law is applied to find the charge/ current in the circuit by applying loop rule and junction rule.
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Mutual inductance of two coils can be increased by
|
(a) Decreasing the number of turns in the coils |
|
(b) Increasing the number of turns in the coils |
|
(c) Winding the coils on wooden core |
|
(d) None of the above |
If the potential of a capacitor having capacity of 6 mF is increased from 10 V to 20 V, then increase in its energy will be
|
(a) 12 × 10–6 J |
(b) 9 × 10–4 J |
(c) 4 × 10–6 J |
(d) 4 × 10–9 J |

If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is
|
(a) 25 : 16 |
(b) 5 : 3 |
(c) 16 : 1 |
(d) 25 : 9 |
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation establishes that bismuth is
|
(a) Diamagnetic |
(b) Paramagnetic |
(c) Ferri-magnetic |
(d) Antiferro-magnetic |