
- AZero
- BMinimum but finite
- CMaximum but finite
- DInfinite

Explanation:
At resonance XL = XC
⇒ R & current is maximum but finite, which is
$\text{I}_\text{max}=\frac{\text{E}}{\text{R}}$ where E is applied voltag.
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Velocity of light in glass whose refractive index with respect to air is 1.5 is 2 × 108 m/s and in certain liquid the velocity of light found to be 2.5 × 108 m/s. The refractive index of the liquid with respect to air is
|
(a) 0.64 |
(b) 0.80 |
(c) 1.20 |
(d) 1.44 |
A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from the centre of the magnet
| (a) North and south | (b) East and west |
| (c) North-east and south-west | (d) North-west and south-east |
A metal conductor of length 1m rotates vertically about one of its ends at angular velocity 5 radians per second. If the horizontal component of earth's magnetic field is 0.2
, then the e.m.f. developed between the two ends of the conductor is
|
(a) 5mV |
(b) 5 |
(c) 50 mV |
(d) 50 μV |
The wavelength of the most energetic X–ray emitted when a metal target is bombarded by 100 KeV electrons is approximately
| (a) 12 Å | (b) 4 Å |
(c) 0.31 Å |
(d) 0.124 Å |