Current Electricity QUESTIONS AND ANSWERS

IIT JEE : Current Electricity QUESTIONS AND ANSWERS :: part1 : 16 to 20

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

16.A wire of resistance R is stretched so that its length increases by 10%. The resistance of the wire increases by:

11%

15%

21%

28%

17.Steady current flows in a metallic conductor of non-uniform cross-section. The quantity constant along the length of the conductor is:

current, electric field and drift speed

drift speed only

current and drift speed

current only

18.When battery and galvanometer are interchanged in the case of Wheatstone bridge, then:

if the bridge was in adjustment before interchange, it will not be in adjustment after interchange

if the bridge was in adjustment before interchange, it will be in adjustment after interchange

if the bridge was in adjustment before interchange, it may or may not be in adjustment after interchange

all of the above

19.Two identical resistors are connected in parallel then connected in series. The effective resistance are in the ratio:

1: 2

2: 1

1: 4

4: 1

20.To use a moving coil galvanometer as an ammeter one must connect:

low resistance in series with the coil

low resistance in parallel with the coil

high resistance in series with the coil

high resistance in parallel with the coil

More Current Electricity QUESTIONS AND ANSWERS available in next pages

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