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JEE 2020 Physics: Current Electricity and Ohm's Law Quiz - 1

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Question 1

Of the following graphs, the one that correctly represents the I-V. characteristics of a ‘Ohmic device’ is

Question 2

A student’s 9.0 V, 7.5W portable radio was left on from 9:00 P.M. until 3:00 A.M. How much charge passed through the wires?

Question 3

A current of 3 A flows through the 2

resistor shown in the circuit. The power dissipated in the 5

resistor is

Question 4

Two batteries one of the emf 3V, internal resistance 1 ohm and the other of emf 15 V, internal resistance 2 ohm are connected in series with a resistance R as shown. If the potential difference between a and b is zero the resistance of R in ohm is

Question 5

In which of the above cells, the potential difference between the terminals of a cell exceeds its emf.

Question 6

A 6.0-volt battery is connected to two light bulbs as shown in figure. Light bulb 1 has resistance 3 ohm while light bulb 2 has resistance 6 ohm. Battery has negligible internal resistance. Which bulb will glow brighter?

Question 7

Two cells with the same emf E and different internal resistances r₁and r₂are connected in series to an external resistance R. The value of R so that the potential difference across the first cell be zero is

Question 8

An energy source will supply a constant current into a load of its internal resistance is

Question 9

A wire which has two sections A and B of diameter 20 cm and 35 cm respectively. Current ‘I’ is passing through the wire. An electrician measure that the mean drift velocity in section A and B are V_A and V_B respectively. Find the ratio of V_B:V_A

Question 10

An electric cell of e.m.f. E is connected across a copper wire of diameter d and length I. The drift velocity of electrons in the wire is v_d. If the length of the wire is changed to 2I, the new drift velocity of electrons in the copper wire will be

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Apr 8JEE & BITSAT