Basics of AC Bridges

Q. The AC bridge shown in the figure is used to measure the impedance Z.

If the bridge is balanced for oscillator frequency f=2 kHz, then the impedance Z will be

1. $(260+j0)\Omega$
2. $(0+j200)\Omega$
3. $(260-j200)\Omega$
4. $(260+j200)\Omega$

Q. The reading of the voltmeter (rms)in volts, for the circuit shown in the figure is

1. 141.42

Q. Figure shows a balanced ac bridge excited by a voltage source of fixed frequency. The impedance of the unknown arm Z, is

1. an R and L in series
2. an R and C in series
3. an R and C in parallel
4. an R and L in parallel