Discussion
A Maxwell-Wien bridge balances with \( R_2 = 1000\ \Omega \), \( R_3 = 500\ \Omega \) and \( C_4 = 0.5\ \mu \)F. Using \( L_1 = R_2 R_3 C_4 \), the unknown inductance is
Answer: B
Substituting gives \( 1000 \times 500 \times 0.5 \times 10^{-6} = 0.25 \) henry. Notice that the frequency does not appear, so this bridge gives the inductance without the supply frequency needing to be known or held steady.
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