- AHertz.
- BHallwachs.
- CLenard.
- DMillikan.
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When a potential difference is applied across the ends of a linear metallic conductor
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(a) The free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor |
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(b) The free electrons are accelerated continuously from the higher potential end to the lower potential end of the conductor |
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(c) The free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor |
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(d) The free electrons are set in motion from their position of rest |
What is the de-Broglie wavelength of the α - particle accelerated through a potential difference V
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(a) |
(b) |
(c) |
(d) |
Assertion : De-morgan's theorem may be explained by the following circuit
Reason : In the following circuit, for output inputs ABC are 101
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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 only property possessed by ferromagnetic substance is
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(a) Hysteresis |
(b) Susceptibility |
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(c) Directional property |
(d) Attracting magnetic substances |
Eight drops of mercury of equal radii possessing equal charges combine to form a big drop. Then the capacitance of bigger drop compared to each individual small drop is
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(a) 8 times |
(b) 4 times |
(c) 2 times |
(d) 32 times |
A solenoid is 1.5 m long and its inner diameter is 4.0 cm. It has three layers of windings of 1000 turns each and carries a current of 2.0 amperes. The magnetic flux for a cross-section of the solenoid is nearly
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(a) 2.5 × 10–7 weber |
(b) 6.31 × 10–6 weber |
(c) 5.2 × 10–5 weber |
(d) 4.1 × 10–5 weber |
10 wires (same length, same area, same material) are connected in parallel and each has 1 Ω resistance, then the equivalent resistance will be
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(a) 10 Ω |
(b) 1 W |
(c) 0.1 W |
(d) 0.001 W |