Explanation:
Nuclear force binds the protons and neutrons in the nucleus of an atom.
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A steady current flows in a metallic conductor of non-uniform cross-section. The quantity/ quantities constant along the length of the conductor is/are
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(a) Current, electric field and drift speed |
(b) Drift speed only |
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(c) Current and drift speed |
(d) Current only |
In any Bohr orbit of the hydrogen atom, the ratio of kinetic energy to potential energy of the electron is
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(a) 1/2 |
(b) 2 |
(c) -1/2 |
(d) -2 |
Davission and Germer experiment proved
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(a) Wave nature of light |
(b) Particle nature of light |
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(c) Both (a) and (b) |
(d) Neither (a) nor (b) |
The resistor of resistance 'R' is connected to 25 V supply and heat produced in it is 25 J/sec. The value of R is
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(a) 225 Ω |
(b) 1 Ω |
(c) 25 Ω |
(d) 50 Ω |
The combined capacity of the parallel combination of two capacitors is four times their combined capacity when connected in series. This means that
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(a) Their capacities are equal |
(b) Their capacities are 1 μF and 2 μF |
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(c) Their capacities are 0.5 μF and 1 μF |
(d) Their capacities are infinite |
Assertion : When the speed of an electron increases its specific charge decreases.
Reason : Specific charge is the ratio of the charge to mass.
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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. |
Given three equal resistors, how many different combination of all the three resistors can be made
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(a) Six |
(b) Five |
(c) Four |
(d) Three |