#### Question

An unknown resistance is placed in the left gap and resistance of 50 ohm is placed in the right gap of a meter bridge. The null point is obtained at 40 cm from the left end. Determine the unknown resistance.

#### Solution

Given:

`R = 50 Omega`

`l_X = 40 cm = 0.4 m`

`l_R = 60 cm = 0.6 m`

To find: Unknown resistance (X)

Formula: `X=R l_X/l_R`

Solution:

`X=(50xx40)/60`

`X=100/3`

`X=33.33 Omega`

The value of unkown resistance is 33.33 Ω.

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#### APPEARS IN

Solution An Unknown Resistance is Placed in the Left Gap and Resistance of 50 Ohm is Placed in the Right Gap of a Meter Bridge. the Null Point is Obtained at 40 Cm from the Left End. Determine the Unknown Resistance. Concept: Meter Bridge.