Which one is reverse-biased
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(a)
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(b)
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(c)
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(d)
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Which one is reverse-biased
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(a)
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(b)
|
(c)
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(d)
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(c)

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Assertion : Light is produced in gases in the process of electric discharge through them at high pressure.
Reason : At high pressure electrons of gaseous atoms collide and reach and excited state.
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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. |
The intensity of electric field required to balance a proton of mass 1.7
and charge 1.6
is nearly
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(a) |
(b) 1 |
(c) 1 |
(d) 1 |
Equivalent resistance between the points A and B is (in W)
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(a) |
(b) 1 |
(c) 2 |
(d) 3 |
The i-V characteristic of a P-N junction diode is shown below. The approximate dynamic resistance of the P-N junction when a forward bias of 2volt is applied

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(a) 1 W |
(b) 0.25 W |
(c) 0.5 W |
(d) 5 W |
Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual
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(a) Only when 2f > u > f |
(b) Only when u = f |
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(c) Only when u < f |
(d) Always |
The binding energy of deuteron
is 1.112 MeV per nucleon and an α - particle
has a binding energy of 7.047 MeV per nucleon. Then in the fusion reaction
the energy Q released is
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(a) 1 MeV |
(b) 11.9 MeV |
(c) 23.8 MeV |
(d) 931 MeV |