In the Wheatstone bridge shown below, in order to balance the bridge, we must have-

Options

A. `R_(1) = 3 Omega, R_(2) = 3 Omega`
B. `R_(1) = 6 Omega, R_(2) =15 Omega`
C. `R_(1) = 1.5 Omega, R_(2)` = any finite value
D. `R_(1) = 3 Omega, R_(2) =` any finite value

Answer

D

Explanation

The bridge ABCD is balanced if
`10/30 = R_(1)/9 = 3 Omega`
As no current flows in arm BD
`therefore R_(2)` = any finite value.