- A+e
- B-e
- C1/e
- D-1/e
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In the following Wheatstone bridge P/Q = R/S. If key K is closed, then the galvanometer will show deflection
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(a) In left side |
(b) In right side |
(c) No deflection |
(d) In either side |
The figure shows a network of currents. The magnitude of currents is shown here. The current i will be
|
(a) 3 A |
(b) 13 A |
(c) 23 A |
(d) – 3 A |
Avalanche breakdown is due to
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(a) Collision of minority charge carrier |
(b) Increase in depletion layer thickness |
|
(c) Decrease in depletion layer thickness |
(d) None of these |
Bohr's atom model assumes
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(a) The nucleus is of infinite mass and is at rest |
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(b) Electrons in a quantized orbit will not radiate energy |
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(c) Mass of electron remains constant |
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(d) All the above conditions |
If a 0.1 % increase in length due to stretching, the percentage increase in its resistance will be
|
(a) 0.2 % |
(b) 2 % |
(c) 1 % |
(d) 0.1 % |
Assertion : A compass needle when placed on the magnetic north pole of the earth rotates in vertical direction.
Reason : The earth has only horizontal component of its magnetic field at the north poles.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |