- AChange in previous direction.
- BNot change.
- CChange in opposite direction.
- DNone of these.
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In the diagram shown, the reading of voltmeter is 20 V and that of ammeter is 4 A. The value of R should be (Consider given ammeter and voltmeter are not ideal)
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(a) Equal to 5Ω |
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(b) Greater from 5 Ω |
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(c) Less than 5 Ω |
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(d) Greater or less than 5 Ω depends on the material of R |
Consider an electron (m = 9.1
confined by electrical forces to move between two rigid walls separated by 1.0
metre, which is about five atomic diameters. The quantised energy value for the lowest stationary state is
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(a) 12 |
(b) 6.0 |
(c) 6.0 |
(d) 6 Joule |
Which of the following statement is true about magnetic moments of atoms of different elements
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(a) All have a magnetic moment |
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(b) None has a magnetic moment |
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(c) All acquire a magnetic moment under external magnetic field and in same direction as the field |
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(d) None of the above statements are accurate |
When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon
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(a) The time for which light falls on the metal |
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(b) Frequency of the incident light |
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(c) Intensity of the incident light |
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(d) Velocity of the incident light |
The back e.m.f. induced in a coil, when current changes from 1 ampere to zero in one milli‑second, is 4 volts, the self inductance of the coil is
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(a) 1 H |
(b) 4 H |
(c) |
(d) 4 |