Question

In a metre bridge the value of resistance in the resistance
box is 8 ohm the balancing length is 40 cm find the value of unknown resistance

Answer 1

Answer:

The value of unknown resistance is 5.33 ohm.

Explanation:

Resistance,Q=8 ohm

Balancing length,l1=40 cm

P/Q=l1/100-l1=l1/l2

P=Q×l1/100-l1

P=8×40/100-40

P=320/60

P=5.33 ohm