a) The arm of a four arm bridge a,b,c and d supplied with sinusoidal…

Previous year question for ELECTRICAL MEASUREMENT AND INSTRUMENTS.

Question

a) The arm of a four arm bridge a,b,c and d supplied with sinusoidal voltage have the following values:

Arm ab: resistance of 500 ohm with a parallel capacitor of $2\mu\text{F}$

Arm bc: 400 ohm resistance

Arm cd: 1kilo ohm resistance

Arm da: A resistance R2 in series with $2\mu\text{F}$ capacitance.

Determine the value of R2 and frequency at which the bridge is balance (10)

b) Which bridge is used for the measurement of the frequency? Derive the balance equation. (10)