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Current Electricity QUESTIONS AND ANSWERS

IIT JEE : Current Electricity QUESTIONS AND ANSWERS :: part2 : 11 to 15

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

11.In a closed circuit the e.m.f. and internal resistance of a battery are E and R respectively. If an external resistance R is connected to the battery, the current flowing through the circuit shall be

Er / R

E / R + r

E / rR

ER / r

12.A voltmeter reading up to 1000 m V is calibrated with a potentiometer. An e. m. f. of 1.08 V is balanced across 5.4 m of the wire. The balanceing length is 4.55 m when the voltmeter reads 0.9 V. The error in the voltmeter reading is

- 0.01 V

zero

- 0.04 V

- 0.06 V

13.Two metallic wires whose masses are 12 g and 18 g have lengths in the ratio of 3 : 4. Their resistances are in the ratio of

27 : 32

4 : 3

9 : 18

18 : 27

14.A voltmeter 100 V range is of 9000 ohm resistance and another voltmeter of range 80 V has a resistance of 11000 ohms. This combination is connected across 120 V.The reading of voltmeter having resistance 11000 ohm is

54 V

44 V

66 V

56 V

15.The current from the battery in the above circuit is

3.7 A

5.7 A

1.7 A

6.7 A

More Current Electricity QUESTIONS AND ANSWERS available in next pages