Question
Physics Question on Cells, Emf, Internal Resistance
The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be
A
1.0 A
B
0.2 A
C
0.1 A
D
2.0 A
Answer
0.2 A
Explanation
Solution
The correct option is (B): 0.2 A