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Test: Measurement of Inductance - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: Measurement of Inductance

Test: Measurement of Inductance for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Measurement of Inductance questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Measurement of Inductance MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Measurement of Inductance below.
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Test: Measurement of Inductance - Question 1

State True / False for following statements:
1. Owen’s bridge is used for inductance measurement of low Q coils.
2. De-Sauty’s bridge is used for measurement of perfect capacitors.

Detailed Solution for Test: Measurement of Inductance - Question 1

Owen’s bridge is used for the inductance measurement of low Q coils.
De-Sauty’s bridge is used for the measurement of perfect capacitors.
So that both statements are true.

Test: Measurement of Inductance - Question 2

Heaviside-Campbell bridge is used to measure

Detailed Solution for Test: Measurement of Inductance - Question 2

Heaviside bridge:

  • Heaviside bridge is used to measure the mutual inductance.
  • The bridge which measures the unknown mutual inductance regarding mutual inductance such type of bridge is known as the Campbell bridge.
  • Mutual inductance is the phenomenon in which the variation of current in one coil induces the current in the nearer coil.
  • The bridge is also used for measuring the frequency by adjusting the mutual inductance until the null point is not obtained.
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Test: Measurement of Inductance - Question 3

Which of the following bridges is used for measuring the inductance?

Detailed Solution for Test: Measurement of Inductance - Question 3

Bridge is a simple closed circuit extensively used for measuring component values such as resistance, inductance, capacitance and for other derived circuit parameters directly from the component values.

Bridge circuit compares the value of unknown quantity with a known quantity.

Maxwell's bridge measures an unknown inductance in terms of known capacitance. It is advanced form of the Wheatstone bridge which works on the principle of comparison. i.e. the value of unknown inductance is determined by comparing it with the known value or standard value.

Two methods are used to determine the self-inductance of the circuit:

1. Maxwell's inductance bridge 

2. Maxwell's inductance capacitance bridge

Test: Measurement of Inductance - Question 4

Hay’s bridge is used for measuring:

Detailed Solution for Test: Measurement of Inductance - Question 4

Hay’s bridge is used for measurement of inductance of coils with high quality factor.

Test: Measurement of Inductance - Question 5

In the bridge circuit shown, at balance condition, the value of C5 = 1 μF and R5 = 2000 Ω. The values of inductance Lx and resistance Rx are

Detailed Solution for Test: Measurement of Inductance - Question 5

In a Maxwell – inductance-capacitance bridge,

Z1Z4 = Z2Z3

Where Z1, Z2, Z3, Z4 are the impedances

Given:

R2 = 1000 Ω,

R3 = 1000 Ω,

R4 = R5 = 2000 Ω,

C5 = C4 = 1 μF

So, for bridge balance,

 Lx/C= R2R3

Lx = R2R3C5

Lx = 1000 × 1000 × 1 μ = 1 H

Also, for Rx

i.e. RxR5 = R2R3

    
So, Lx = 1H, Rx = 500 Ω

Test: Measurement of Inductance - Question 6

The bridge circuit shown in fig below is used for the measurement of an unknown element Zx the bridge circuit is best suited when Zx is a

Test: Measurement of Inductance - Question 7

Maxwell’s bridge measures an unknown inductance in terms of:

Detailed Solution for Test: Measurement of Inductance - Question 7


Here R1 and L1 are the unknown resistance and inductance of the coil.

At bridge balance condition,

Z1Z4 = Z2Z3

From the above expression, it is clear that unknown inductance (L1) is in terms of known capacitance C4

Test: Measurement of Inductance - Question 8

A maxwell bridge is used for measurement of

Detailed Solution for Test: Measurement of Inductance - Question 8

Maxwell’s inductance bridge:

In Maxwell’s inductance bridge resistance is connected in parallel with the standard capacitor. It is commonly used for measurement of Inductance of a coil having Q value in the range of (1< Q < 10).

In Maxwell’s inductance bridge resistance is connected in parallel with the standard capacitor.

Test: Measurement of Inductance - Question 9

Which of the following bridges is used for most accurate inductance measurement of inductors having high value of Q-factor?

Detailed Solution for Test: Measurement of Inductance - Question 9

Hay’s bridge:

  • In Hay’s bridge, a resistance is connected in series with a standard capacitor.
  • Hay’s bridge is used for the measurement of the inductance of coils with high-quality factors.


Maxwell’s inductance-capacitance bridge:

In Maxwell’s inductance bridge resistance is connected in parallel with the standard capacitor.

Test: Measurement of Inductance - Question 10

Which of the following statements is not true with respect to Maxwell's bridge?

Detailed Solution for Test: Measurement of Inductance - Question 10

Maxwell’s inductance bridge:

In Maxwell’s inductance bridge resistance is connected in parallel with the standard known capacitor. It is commonly used for the measurement of the Inductance of a coil having a Q value in the range (medium) of (1< Q < 10).


 

In Maxwell’s inductance bridge resistance is connected in parallel with the standard capacitor.

Notes:

1) A Maxwell bridge is a modification to a Wheatstone bridge used to measure an unknown inductance (usually of low Q value) in terms of calibrated resistance and inductance or resistance and capacitance

2) Maxwell-Wien Bridge, also known as Maxwell Inductance bridge can measure unknown inductance when a known capacitance in the bridge is given.

Equations of Maxwell-Wien bridge are:

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