550 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Variation of current and voltage in a conductor has been shown in the diagram below. The resistance of the conductor is
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(a) 4 ohm |
(b) 2 ohm |
(c) 3 ohm |
(d) 1 ohm |
Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is
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(a) 3 W |
(b) 4 W |
(c) 4.5 W |
(d) 5 W |
When a current I is passed through a wire of constant resistance, it produces a potential difference V across its ends. The graph drawn between log I and log V will be
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(a)
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(b)
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(c)
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(d)
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Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram. If the resistance (R) is determined at the points A, B, C and D, we will find that
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(a) RC = RD |
(b) RB > RA |
(c) RC > RB |
(d) None of these |
In the circuit shown below E1 = 4.0 V, R1 = 2 W, E2 = 6.0 V, R2 = 4 W and R3 = 2 W. The current I1 is
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(a) 1.6 A |
(b) 1.8 A |
(c) 1.25 A |
(d) 1.0 A |
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