AC & DC Bridges – 1 – 1

1. Wein bridge finds application in :

(a) Frequency determination
(b) Resistance measurement only
(c) Harmonic distortion analyzer
(d) a and c both

ANSWER

EXPLANATION

2. The most common method for measurement of low resistance is :

(a) Wheatstone bridge
(b) Potentiometer method
(c) Voltmeter-ammeter method
(d) Kelvin’s double bridge

ANSWER

EXPLANATION

3. Precision measurement of resistances is generally carried out by :

(a) Potentiometer method
(b) CRO method
(c) Voltmeter-ammeter method
(d) Bridge method

ANSWER

EXPLANATION

4. Wagner earthing device :

(a) Does not affect AC bridges
(b) Affects DC potentiometer
(c) Makes possible very high accuracy in measurement
(d) Reduces the frequency and waveform errors in AC bridges

ANSWER

EXPLANATION

5. The lower limit for bridge-method of measurement is decided by :

(a) The sensitivity of detector circuit
(b) Resistance of connecting wires and contact resistances
(c) Resistance of the other-three known arms
(d) None of these

ANSWER

EXPLANATION

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