Question
A meter bridge is set-up as shown, to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of
10.2 ohm
10.6 ohm
10.8 ohm
11.1 ohm
Solution
B.
10.6 ohm
Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component.
Applying the condition of balanced Wheatstone bridge,
we get
=
X = 10 Ω ×
X = 10.6 Ω
