This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Maxwell’s Inductance Capacitance Bridge”.

1. Maxwell inductance capacitance bridge can be used for _________

a) measurement of inductance

b) measurement of capacitance and inductance

c) measurement of resistance

d) measurement of voltage and current

View Answer

Explanation: A Maxwell inductance capacitance bridge is used for the measurement of inductance by making comparison with a standard capacitance value. Voltmeter is used to measure voltage, while an ammeter is used to measure current.

2. Balance equation for computing the unknown resistance is

View Answer

Explanation: The balance condition for determining the value of the unknown resistance is given by the relation R

_{x}=

^{R2 R3}⁄

_{R1}.

where, R

_{1}and R

_{3}are variable resistances and R

_{2}is a fixed resistance.

3. Balance equation for computing the value of the unknown inductance is

a) L_{x} = R_{2} R_{3}

b) L_{x} = R_{2} C_{1}

c) L_{x} = R_{2} R_{3} C_{1}

d) L_{x} = R_{3} C_{1}

View Answer

Explanation: The balance equation for determining the value of the unknown inductance is given by the relation L

_{x}= R

_{2}R

_{3}C

_{1}.

where,

C

_{1}is the capacitance across the resistance R

_{1}

R

_{3}is a variable resistance and R

_{2}is a fixed resistance.

4. Quality factor of the circuit is given by _________

a) Q = ωC_{1}

b) Q = ωR_{1}

c) Q = ω

d) Q = ωR_{1} C_{1}

View Answer

Explanation: The quality factor of a Maxwell inductance capacitance bridge is given by the relation

5. Standard inductor requires no shielding.

a) True

b) False

View Answer

Explanation: Stray magnetic fields are present in a circuit consisting of inductances and capacitances. In order to eliminate the stray magnetic fields proper shielding is required for the standard inductance.

6. Standard inductor provides rated inductance directly.

a) True

b) False

View Answer

Explanation: When the current flow through the standard inductance is adjusted precisely, it provides its rated value of inductance.

7. What is the significance of capacitors in a Maxwell bridge?

a) they are used to block dc

b) they are used to block ac

c) they are cheap

d) they are expensive

View Answer

Explanation: In a Maxwell inductance capacitance bridge, the capacitors are cheaper when compared to stable and accurate standard value of inductors.

8. The bridge balance equation can be written in _________

a) impedance form

b) resistance form

c) conductance form

d) admittance form

View Answer

Explanation: The bridge balance equation for a Maxwell inductance capacitance bridge consists of admittances. This is due to the connection of a capacitance in parallel across the resistance in one of the ratio arms.

**Sanfoundry Global Education & Learning Series – Electrical Measurements.**

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