- AMetallic conductor
- BThyristor
- CWater voltameter
- Dp-n junction diode
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Light takes 8 min 20 sec to reach from sun on the earth. If the whole atmosphere is filled with water, the light will take the time (a
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(a) 8 min 20 sec |
(b) 8 min |
(c) 6 min 11 sec |
(d) 11 min 6 sec |
A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during one cycle is

(a)
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(b)
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(c)
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(d)
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In a Wheatstone’s bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is
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(a) |
(b) R |
(c) 2R |
(d) |
If the cathode–anode potential difference in an X-ray tube be 105 V, then the maximum energy of X-ray photon can be
| (a) 105 J | (b) 105 MeV | (c) 10–1 MeV | (d) 105 KeV |
The charge density in a nucleus varies with distance from the centre of the nucleus according to the curve in Fig.
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(a) |
(b) |
(c) |
(d) |