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Current Electricity QUESTIONS AND ANSWERS

IIT JEE : Current Electricity QUESTIONS AND ANSWERS :: part2 : 6 to 10

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

6.When cells are connected in series

the e.m.f. increases

the p.d. decreases

current capacity increases

the current capacity decreases

7.8 cells, each having e.m.f. 1.5 V and internal resistance 0.2 ohm are connected in series. By mistake two cells have been connected with the reversed terminals. The current flowing through an external resistance of 1.4 ohm will be

3 A

2 A

1 A

4 A

8.A cell of e. m. f. E is connected across resistance R. The potential difference between the terminals of a cell is found to be V. The internal resistance of the cell must be

(E - V) / R

(E - V) R

2(E - V) / R

2 (E - V) / R V

9.Mixed groups of cells will send the maximum current in the external circuit when total internal resistance is

less than external resistance

more than external resistance

equal to external resistance

zero

10.A battery of e. m. f. E and internal resistance r is being charged with current i. The terminal potential will be

E + ir

E - ir