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:
2.0 A
1.0 A
0.2 A
0.1 A
As discussed in @8173
Option 1)
2.0 A
This answer is incorrect
Option 2)
1.0 A
This answer is incorrect
Option 3)
0.2 A
This answer is correct
Option 4)
0.1 A
This answer is incorrect
The resistance in the two arms of the metre Bridge are 5 ohm and 6 ohm respectively when the resistance R is shunted with unequal resistance the new balance point is at 1.6 L1 the resistance R is