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51.

An Anderson’s bridge can be used to ________(a) measure mutual inductance(b) measure impedance(c) measure self inductance(d) measure stray capacitanceI have been asked this question in examination.This interesting question is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right choice is (C) measure SELF inductance

The explanation: An Anderson bridge can be USED for the measurement of the self-inductance of a COIL.A coil with unknown capacitance can be used to determine its self-inductance by making use of an Anderson bridge.

52.

What is the significance of Anderson bridge with respect to Q factor?(a) difficult to balance the bridge(b) easy to balance the bridge(c) intermediate balance can be achieved(d) no balance can be doneThe question was posed to me in an interview.My doubt is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (B) easy to balance the bridge

For EXPLANATION: An Anderson’s bridge is a modified form of the MAXWELL bridge and is used for the measurement of UNKNOWN capacitance in terms of self-inductance of standard value. It is easy to ACHIEVE balance condition in an Anderson bridge.

53.

Anderson’s bridge ________(a) can’t be shielded(b) can be fully shielded(c) can be partially shielded(d) can be shielded based on the components usedI have been asked this question in examination.Question is taken from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right OPTION is (a) can’t be shielded

Easiest explanation: An Anderson’s BRIDGE is a complex CIRCUIT and a modified form of the Maxwell bridge. An Anderson’s bridge cannot be shielded due to the PRESENCE of an additional JUNCTION point.

54.

Components in an Anderson’s bridge are ________(a) less(b) zero(c) intermediate(d) moreI had been asked this question at a job interview.Question is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT answer is (d) more

Explanation: An Anderson’s bridge is a complex TYPE of bridge used basically for the MEASUREMENT of unknown capacitance. It consists of several RESISTANCES, inductances and capacitances in the ratio ARMS.
55.

Bridge balance equations are ________(a) easy to derive(b) independent of the components(c) complex in nature(d) real in natureThis question was addressed to me in an international level competition.This interesting question is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right answer is (c) complex in nature

The BEST I can explain: An Anderson’s bridge is BASICALLY used for the MEASUREMENT of unknown capacitance VALUE in terms of the self-inductance of one of the ratio arms. It consists of real as well as complex terms. It also comprises of star-delta equivalent networks for impedance computations.

56.

Anderson’s bridge is very basic.(a) True(b) FalseThe question was asked in an interview for job.My query is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct CHOICE is (b) False

To explain I would say: An Anderson’s bridge is basically used for the MEASUREMENT of unknown CAPACITANCE VALUE in terms of the self-inductance of one of the standard ratio arms. It is a complex bridge comprising of equivalent star-delta networks for computation of resistance and inductance.

57.

Anderson’s bridge makes use of a variable capacitance.(a) True(b) FalseI got this question in an interview for internship.Enquiry is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right choice is (b) False

To explain I would say: An Anderson’s bridge MAKES use of a fixed CAPACITANCE VALUE. Most of the other AC bridges used for the measurement of either capacitance, INDUCTANCE or IMPEDANCE make use of a variable capacitance.

58.

Anderson’s bridge is used for the measurement of ________(a) capacitance(b) resistance(c) inductance(d) impedanceThe question was posed to me in quiz.I would like to ask this question from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The CORRECT answer is (a) CAPACITANCE

To explain: Anderson’s BRIDGE is used for the measurement of capacitance. Unknown capacitance value can be measured accurately in terms of the self-inductance of ONE of the ratio ARMS of the bridge.

59.

Anderson’s bridge is used for the measurement of capacitance.(a) True(b) FalseThe question was asked during an interview.I would like to ask this question from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct answer is (a) True

For explanation I WOULD say: When a calibrated self-inductance is available, the value of unknown CAPACITANCE can be computed by making use of ANDERSON’s BRIDGE.

60.

When the capacitor used is imperfect, the inductance value changes.(a) True(b) FalseThis question was addressed to me in a national level competition.I need to ask this question from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right OPTION is (b) False

To elaborate: For an imperfect capacitor USED in the Anderson bridge, the value of inductance remains UNAFFECTED. The value of R1 changes.

61.

Balance equation for computing the inductance is ________(a) Lx = R3 R5(b) Lx = CR5(c) Lx = CR3(d) Lx = CR3 R5The question was asked in semester exam.I want to ask this question from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (d) Lx = CR3 R5

The EXPLANATION: The balance equation for computing the self-inductance in an ANDERSON’s bridge is GIVEN by the equation, Lx = CR3 R5.

where, C is the standard capacitance

 R3 and R5 are the KNOWN non-inductive RESISTANCES.

62.

Which of the following is a balance equation for computing the resistance?(a) R1 = ^R2 R3⁄R4(b) R1 = ^R2 ⁄ R4(c) R1 = ^R3 ⁄ R4(d) R1 = R2 R3This question was posed to me in a national level competition.This intriguing question originated from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct OPTION is (a) R1 = ^R2 R3⁄R4

For explanation I would SAY: The balance equation for computing the resistance in an Anderson’s bridge is GIVEN by the equation R1 = ^R2 R3⁄R4.

where, R2, R3 and R4 are the known non-inductive resistances.

63.

Anderson’s bridge is basically used for ________(a) measurement of capacitance(b) measurement of resistance(c) measurement of inductance(d) measurement of voltageThe question was posed to me by my college director while I was bunking the class.The origin of the question is Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»
64.

Anderson bridge is a modified form of ________(a) Wheatstone’s bridge(b) Maxwell bridge(c) Kelvin double bridge(d) Schering bridgeThe question was asked in class test.This interesting question is from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct option is (b) Maxwell BRIDGE

The explanation: The ANDERSON’s bridge is a modified FORM of Maxwell’s bridge which is used for the measurement of self-inductances in terms of STANDARD capacitance value. Wheatstone bridge and Kelvin bridge are used for the measurement of MEDIUM and low resistances respectively.

65.

Anderson bridge is used for _________(a) the measurement of self-inductance(b) the measurement of resistance(c) the measurement of capacitance(d) the measurement of impedanceI have been asked this question during a job interview.I'd like to ask this question from Anderson Bridge, Advantages & Disadvantages of Anderson Bridge topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct choice is (a) the measurement of self-inductance

Explanation: The Anderson BRIDGE is ONE of the important bridges used for the measurement of self-inductances in terms of STANDARD capacitance value. RESISTANCE is usually measured by making use of a Wheatstone’s bridge or Kelvin’s double bridge.

66.

Bridge is used for the measurement of _________(a) high Q factor(b) medium Q factor(c) low Q factor(d) very low Q factorI had been asked this question in a national level competition.The doubt is from Inductance Comparison Bridge topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct OPTION is (b) medium Q factor

Easy explanation: The INDUCTANCE comparison bridge is used for the measurement of LOW Q factor values of the order of 1 to 10. It cannot be used for the measurement of Q factors below 1. As a result, the bridge is used for the measurement of medium Q factor values.

67.

Bridge can be used at audio frequency.(a) True(b) FalseThis question was posed to me by my college professor while I was bunking the class.My question comes from Inductance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer» RIGHT option is (a) True

Explanation: An inductance comparison bridge can be used for measurement of UNKNOWN inductance at a wide range of audio frequencies in the order of a few Hz to KHz.
68.

Bridge depends on frequency.(a) True(b) FalseThe question was posed to me during a job interview.I'm obligated to ask this question of Inductance Comparison Bridge in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct answer is (B) False

The best EXPLANATION: In an INDUCTANCE comparison BRIDGE, the balance equation is independent of FREQUENCY. As a result the bridge balance condition remains unaffected by variation in the value of frequency.

69.

Inductance control is obtained by _________(a) using R2(b) using R1(c) using R3(d) using LxThe question was posed to me during an interview.The question is from Inductance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct CHOICE is (a) using R2

The explanation: In an inductance comparison bridge, the resistance R2 and R3 are variable. The value of resistance R2 is VARIED so as to control the inductance of the bridge.

70.

The value of unknown inductance is found by using which of the following relation?(a) Lx = \(\frac{R_1 L_3}{R_2}\)(b) Lx = \(\frac{R_2}{R_1}\)(c) Lx = \(\frac{L_3}{R_1}\)(d) Lx = \(\frac{R_2 L_3}{R_1}\)I had been asked this question in a job interview.Question is from Inductance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct choice is (d) Lx = \(\frac{R_2 L_3}{R_1}\)

Easy explanation: At balance condition in an INDUCTANCE comparison BRIDGE, the VALUE of unknown inductance is found by USING the relation Lx = \(\frac{R_2 L_3}{R_1}\).

71.

Value of unknown resistance is found by using which of the following relation?(a) Rx = \(\frac{R_1 R_3}{R_2}\)(b) Rx = \(\frac{R_2 R_1}{R_3}\)(c) Rx = \(\frac{R_2 R_3}{R_1}\)(d) Rx = \(\frac{R_2}{R_1}\)This question was posed to me in quiz.The above asked question is from Inductance Comparison Bridge in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct answer is (C) Rx = \(\frac{R_2 R_3}{R_1}\)

EXPLANATION: The inductance comparison bridge MAINLY consists of pure resistances in its ratio arm. The VALUE of unknown resistance is given by the relation Rx = \(\frac{R_2 R_3}{R_1}\).

72.

Ratio arms of the bridge consists of _________(a) pure inductances(b) pure resistances(c) pure capacitances(d) inductance and capacitanceThe question was asked in a job interview.The question is from Inductance Comparison Bridge in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (b) pure resistances

For EXPLANATION I WOULD say: An inductance COMPARISON bridge is basically USED to compute the unknown resistance and inductance values. Ratio arms of an inductance bridge CONSISTS of pure resistances.

73.

Actual balance condition can be obtained by _________(a) varying R1(b) varying R3(c) varying R2(d) varying R1 and R3I have been asked this question during an online interview.My doubt stems from Capacitance Comparison Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct option is (d) varying R1 and R3

The best I can EXPLAIN: Resistances R1 and R3 are VARIABLE, while resistance R2 is FIXED. By varying the resistances R1 and R3, we GET the actual balance condition.

74.

Inductance comparison bridge is used to compute _________(a) unknown inductance and resistance(b) unknown resistance(c) unknown inductance(d) unknown capacitanceThis question was addressed to me in an international level competition.The origin of the question is Inductance Comparison Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT option is (a) UNKNOWN inductance and RESISTANCE

Explanation: By making USE of an inductance COMPARISON bridge, the values of unknown inductance and its internal resistance can be determined.
75.

Unknown capacitance is found by using which of the following relation?(a) Cx = \(\frac{C_3 R_2}{R_1}\)(b) Cx = \(\frac{C_3}{R_2}\)(c) Cx = \(\frac{C_3 R_1}{R_2}\)(d) Cx = \(\frac{R_1}{R_2}\)I had been asked this question by my college professor while I was bunking the class.The origin of the question is Capacitance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The CORRECT choice is (c) Cx = \(\frac{C_3 R_1}{R_2}\)

Easiest explanation: The VALUE of unknown capacitance is FOUND using the relation Cx = \(\frac{C_3 R_1}{R_2}\)at BALANCE CONDITION.

76.

Impedance Z3 consists of_________(a) resistance R3(b) capacitance C3(c) vibration galvanometer(d) capacitance C3 in series with resistance R3This question was addressed to me in quiz.The query is from Capacitance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct answer is (d) capacitance C3 in series with resistance R3

The best explanation: IMPEDANCE usually REFERS to the combination of resistance and EITHER capacitance or inductance. As we are considering the CASE of capacitance measurement, impedance Z3 COMPRISES capacitance C3 in series with resistance R3.

77.

Unknown resistance is obtained by using which of the following relation?(a) Rx = \(\frac{R_1 R_3}{R_2}\)(b) Rx = \(\frac{R_2 R_3}{R_1}\)(c) Rx = \(\frac{R_2 R_1}{R_3}\)(d) Rx = \(\frac{R_2}{R_1}\)I have been asked this question in an international level competition.Question is from Capacitance Comparison Bridge topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT answer is (B) Rx = \(\frac{R_2 R_3}{R_1}\)

The explanation: The value of the unknown RESISTANCE is obtained by using the relation

 Rx = \(\frac{R_2 R_3}{R_1}\)

at BALANCE condition.
78.

Unknown capacitance value is obtained by _________(a) comparison with standard(b) using a tuned detector(c) using capacitance of other ratio arms(d) using a vibration galvanometerThe question was posed to me at a job interview.My question is from Capacitance Comparison Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»
79.

Impedance Z4 consists of _________(a) resistance Rx(b) capacitance Cx(c) combination of capacitance Cx and resistance Rx(d) consists of a detectorThe question was asked by my school principal while I was bunking the class.This intriguing question comes from Capacitance Comparison Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT answer is (C) COMBINATION of capacitance Cx and resistance Rx

The explanation is: Ratio ARM Z4 consists of the unknown impedance. Impedance Z4 consists of capacitance Cx in series with a leakage resistance Rx.
80.

How is the bridge balanced?(a) using resistance R1(b) using resistance R3(c) through capacitance C3(d) through capacitance CxI had been asked this question in a national level competition.Asked question is from Capacitance Comparison Bridge in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct choice is (b) using resistance R3

For explanation I WOULD say: Bridge balance is obtained by varying the resistance R3. At balance we get the value of the UNKNOWN resistance as Rx = ^R1 R3⁄R2.

81.

In a capacitance bridge, the arms are _________(a) resistive(b) capacitive(c) inductive(d) mixture of resistance, capacitance and inductanceI have been asked this question in unit test.I would like to ask this question from Capacitance Comparison Bridge topic in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»
82.

When a bridge is balanced?(a) no voltage drop across the circuit(b) power dissipation is high(c) temperature of the circuit is high(d) no current flowsI had been asked this question during an interview for a job.Query is from Bridge Balance Equation topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct answer is (d) no current FLOWS

For explanation I would say: At BALANCE condition, no current flows through the HEADPHONES present in the AC bridge circuit. As a RESULT the detector indicates null deflection at balance condition.

83.

For capacitive impedances, the phase angle is _______(a) tangential(b) negative(c) positive(d) logarithmicI got this question during an interview.Asked question is from Bridge Balance Equation topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT option is (b) NEGATIVE

Best explanation: The voltage across a capacitor does not rise instantaneously. For capacitive IMPEDANCES, the current leads the voltage and as a result the phase ANGLE is negative.
84.

For inductive impedances, the phase angle is _______(a) positive(b) negative(c) zero(d) exponentialThe question was posed to me during an online exam.I need to ask this question from Bridge Balance Equation in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (a) positive

The best explanation: The current through an inductor does not increase INSTANTANEOUSLY. For inductive impedances, the VOLTAGE leads the current and as a result the phase ANGLE is positive.

85.

Bridge must be balanced for ________(a) magnitude(b) angle(c) magnitude and angle(d) powerThe question was asked during an interview for a job.I'm obligated to ask this question of Bridge Balance Equation in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right OPTION is (c) magnitude and angle

For EXPLANATION I would say: The RATIO arms consist of impedances which have magnitude as WELL as phase. In an AC bridge, balance condition implies magnitude balance as well as angular balance.

86.

Phase angle is based on _______(a) source(b) detector(c) power(d) impedanceThe question was posed to me in an international level competition.The query is from Bridge Balance Equation in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT choice is (d) impedance

To EXPLAIN: The four ratio arms COMPRISE of impedances which consist of not only magnitude but some phase as well. VALUE of the phase angles are based on the component of individual impedances.
87.

Angular balance equation is given by which of the following relation?(a) θ1 × θ4 = θ2 × θ3(b) θ1 + θ4 = θ2 + θ3(c) θ2 + θ4 = θ1 + θ3(d) θ2 × θ4 = θ1 × θ3The question was posed to me during an interview.My enquiry is from Bridge Balance Equation topic in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Right answer is (B) θ1 + θ4 = θ2 + θ3

To explain I would say: The angular balance CONDITION in an AC bridge is given by the relation

θ1 + θ4 = θ2 + θ3

Where,

θ1, θ2, θ3 and θ4 are the phase angles of the impedances Z1, Z2, Z3 and Z4.

88.

Bridge balance equation for magnitude is given by which of the following relation?(a) Z1 Z4 = Z2 Z3(b) Z1 Z2 = Z3 Z4(c) Z2 Z4 = Z1 Z3(d) Z1 Z3 = Z2 Z4I have been asked this question during an internship interview.Query is from Bridge Balance Equation in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»
89.

Tuned amplifier circuits respond to broad bandwidth at bridge frequency.(a) True(b) FalseI got this question during an online exam.This interesting question is from Sources and Detectors in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (b) False

To explain: AMPLIFIERS can be used to detect the BALANCE condition in AC bridges. Tuned amplifier circuits consist of transistors that respond to a NARROW bandwidth at the bridge frequency.

90.

The output power of an oscillator is not enough to drive power circuits.(a) True(b) FalseThis question was addressed to me by my college director while I was bunking the class.This intriguing question originated from Sources and Detectors in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT ANSWER is (B) False

Best explanation: Power circuits generally REQUIRE a low output in order to function. An ELECTRONIC oscillator provides sufficient output power to drive power circuits.
91.

Tuned amplifiers can be set to _______(a) low frequencies(b) high frequencies(c) any frequency(d) audio frequenciesI got this question during an online exam.The query is from Sources and Detectors in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct option is (c) any frequency

For EXPLANATION I WOULD SAY: TUNING refers to varying a parameter. Tuned amplifier circuits can be set to any DESIRED frequency.

92.

The output frequency of an oscillator is _______(a) unstable and fixed(b) stable and adjustable(c) stable and fixed(d) unstable and variableI have been asked this question in an interview for internship.My question is based upon Sources and Detectors in division Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct answer is (b) stable and adjustable

Best explanation: In an electronic oscillator, the OUTPUT frequency is stable. It can be determined ACCURATELY and is ALSO adjustable.

93.

The power output for a typical oscillator is _______(a) 1 kW(b) 1 MW(c) 1 mW(d) 7 WThis question was posed to me in an international level competition.This interesting question is from Sources and Detectors topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct OPTION is (d) 7 W

Best explanation: Oscillator USUALLY has a LOW power output. A typical oscillator has a power output of around 7 W.

94.

The output waveform in an oscillator is_______(a) sinusoidal(b) cosinusoidal(c) tangential(d) logarithmicI have been asked this question during an interview.This is a very interesting question from Sources and Detectors topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct answer is (a) sinusoidal

To explain I would say: AC supply is GENERALLY in the FORM of sinusoidal SIGNAL. In an electronic oscillator, OUTPUT WAVEFORM is very close to sinusoidal.

95.

The frequency range of a typical oscillator is _______(a) 1 Hz to 50 Hz(b) 1 kHz to 100 KHz(c) 40 Hz to 125 kHz(d) 1 MHz to 150 MHzThis question was addressed to me by my college director while I was bunking the class.I'm obligated to ask this question of Sources and Detectors in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer» RIGHT choice is (C) 40 Hz to 125 kHz

Explanation: An OSCILLATOR has a frequency RANGE SLIGHTLY above the audio frequency. A typical oscillator has a frequency range of 40 Hz to 125 kHz.
96.

At high frequencies in an AC bridge, the source is _______(a) tuned amplifiers(b) oscillators(c) vibration galvanometer(d) high voltage sourceThe question was asked by my college professor while I was bunking the class.This intriguing question originated from Sources and Detectors topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct answer is (b) OSCILLATORS

Easy EXPLANATION: Tuned amplifiers are used as a source of voltage in AC BRIDGES. Electronic oscillators are used as a source of SUPPLY for bridge measurements in an AC bridge circuit at HIGH frequencies.

97.

AC bridge is an outcome of ________(a) Kelvin bridge(b) Megger(c) De Sauty bridge(d) Wheatstone bridgeThis question was addressed to me in homework.My enquiry is from Introduction to AC Bridges topic in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer» CORRECT ANSWER is (d) WHEATSTONE BRIDGE

For explanation I would say: Wheatstone bridge is the simplest form of bridge for the measurement of resistance and forms the BASIS for an AC bridge. Kelvin bridge is used for the measurement of low resistance and a megger is used for the measurement of high resistances.
98.

At very low frequencies in a AC bridge, the source is _________(a) power line(b) e.m.f(c) galvanometer(d) tuned circuitI had been asked this question in a job interview.I'm obligated to ask this question of Sources and Detectors in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

Correct answer is (a) power LINE

To explain: GALVANOMETER is used for detecting the balance condition. The power line acts as a source of supply for bridge MEASUREMENTS in an AC bridge CIRCUIT at very low frequencies.

99.

Vibration galvanometers are used for ________(a) very high frequency(b) very low frequency(c) low audio frequency(d) high audio frequencyThe question was posed to me by my college director while I was bunking the class.The doubt is from Introduction to AC Bridges in section Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The CORRECT choice is (c) low audio frequency

Best explanation: VIBRATION GALVANOMETERS are used as DETECTORS in AC bridges for low audio frequency. Low audio frequency ranges from 5 Hz to 1000 Hz.

100.

Tuned detectors are used in the frequency range of ________(a) 1 Hz to 100 Hz(b) 10 Hz to 100 Hz(c) 1 kHz to 100 kHz(d) 1 MHz to 100 MHzThe question was posed to me in an internship interview.The doubt is from Introduction to AC Bridges topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer»

The correct option is (b) 10 Hz to 100 Hz

To EXPLAIN I would say: Tuned amplifier circuits are USED as detectors in the low FREQUENCY range. Low frequency range USUALLY ranges from 10 Hz to 100 Hz in AC bridges.