Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. In response, the loop-B
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(a) Remains stationary |
|
(b) Is attracted by the loop-A |
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(c) Is repelled by the loop-A |
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(d) Rotates about its CM, with CM fixed |
(c) Is repelled by the loop-A
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A hydrogen atom in its ground state absorbs 10.2 eV of energy. The orbital angular momentum is increased by (Given Planck constant h = 6.6 
J - sec)
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(a) 1.05 |
(b) 3.16 |
(c) 2.11 |
(d) 4.22 |
A power transformer is used to step up an alternating e.m.f. of 220 V to 11 kV to transmit 4.4 kW of power. If the primary coil has 1000 turns, what is the current rating of the secondary ? Assume 100% efficiency for the transformer
|
(a) 4 A |
(b) 0.4 A |
(c) 0.04 A |
(d) 0.2 A |
In Young's double slit experiment, angular width of fringes is 0.20o for sodium light of wavelength 5890 Å. If complete system is dipped in water, then angular width of fringes becomes
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(a) 0.11o |
(b) 0.15o |
(c) 0.22o |
(d) 0.30o |
A conductor ABOCD moves along its bisector with a velocity of 1 m/s through a perpendicular magnetic field of 1 wb/m2, as shown in fig. If all the four sides are of 1m length each, then the induced emf between points A and D is
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(a) 0 |
(b) 1.41 volt |
(c) 0.71 volt |
(d) None of the above |