A 100 μA ammeter has an internal resistance of 100 Ω. The range is to be extended to 500 μA. The shunt required is of resistance ______
1.20.0 Ω
2.22.22 Ω
3. 25.0 Ω
4.50.0 Ω
Posted Date:-2022-05-03 00:08:20
Balance equation for computing the inductance is ________
1.Lx = R3 R5
2.Lx = CR5
3.Lx = CR3
4.Lx = CR3 R5
Posted Date:-2022-05-03 00:38:25
Bridge balance equation for magnitude in terms of admittances is given by the relation.
1. Y1Y3 = Y2Y4
2.Y1Y2 = Y3Y4
3.Y1Y4 = Y2Y3
4.Y1 Y3 = Y2 Y4
Posted Date:-2022-05-03 00:30:11
Impedance Z3 consists of______
1.resistance R3
2.capacitance C3
3.vibration galvanometer
4.capacitance C3 in series with resistance R3
Posted Date:-2022-05-03 00:33:03
Impedance Z4 consists of ______
1. resistance Rx
2.capacitance Cx
3.combination of capacitance Cx and resistance Rx
4.consists of a detector
Posted Date:-2022-05-03 00:32:32
Ratio arms of the bridge consists of _____
1.pure inductances
2.pure resistances
3. pure capacitances
4.inductance and capacitance
Posted Date:-2022-05-03 00:34:56
Resistance is measured by the voltmeter-ammeter method employing DC excitation and a voltmeter is connected directly across the unknown resistance. If the voltmeter and ammeter readings are subject to maximum possible errors of ±2.4 % and ±1% respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is?
1.1.4 %
2. 1.7 %
3.2.4 %
4.3.4 %
Posted Date:-2022-05-03 00:08:49
The output waveform in an oscillator is _______
1.sinusoidal
2.cosinusoidal
3. tangential
4.logarithmic
Posted Date:-2022-05-03 00:22:53
Tuned detectors are used in the frequency range of ____
1.1 Hz to 100 Hz
2.10 Hz to 100 Hz
3.1 kHz to 100 kHz
4. 1 MHz to 100 MHz
Posted Date:-2022-05-03 00:19:00
A 35 V DC supply is connected across a resistance in series with an unknown resistance R. a voltmeter having a resistance of 1.2 kΩ is connected across 600 Ω resistance and reads 5 V. The value of the known resistance is 600 Ω. The value of resistance R will be?
1. 120 Ω
2.400 Ω
3.1.8 kΩ
4.2.4 kΩ
Posted Date:-2022-05-03 00:06:51
A DC ammeter has a resistance of 0.1 Ω and its current range is 0-100 A. If the range is to be extended to 0-500 A, the meter requires which of the following shunt resistance?
1.0.010 Ω
2.0.011 Ω
3.0.025 Ω
4.1.0 Ω
Posted Date:-2022-05-03 00:07:50
A DC ammeter is rated for 15 A, 250 V. The meter constant is 14.4 A-s/rev. The meter constant at rated voltage may be expressed as ______
1.3750 rev/kW-h
2.3600 rev/kW-h
3. 1000 rev/kW-h
4.960 rev/kW-h
Posted Date:-2022-05-03 00:07:22
A galvanometer with a full-scale current of 10 mA has a resistance of 1000 Ω. The multiplying power of a 100 Ω shunt with this galvanometer is?
1.110
2.100
3.11
4.10
Posted Date:-2022-05-03 00:09:15
A setup is used to measure resistance R. The ammeter and voltmeter resistance are 0.01 Ω and 2000 Ω respectively. Their readings are 2 A and 180 V respectively, giving a measured resistance of 90 Ω. The percentage error in the measurement is?
1.2.25 %
2.2.35 %
3.4.5 %
4.4.71 %
Posted Date:-2022-05-03 00:06:21
AC bridge is an outcome of ________
1.Kelvin bridge
2.Megger
3.De Sauty bridge
4.Wheatstone bridge
Posted Date:-2022-05-03 00:19:50
Actual balance condition can be obtained by _____
1.varying R1
2.varying R3
3.varying R2
4.varying R1 and R3
Posted Date:-2022-05-03 00:33:52
Anderson bridge is a modified form of ________
1.Wheatstone’s bridge
2.Maxwell bridge
3.Kelvin double bridge
4.Schering bridge
Posted Date:-2022-05-03 00:37:37
Anderson bridge is used for ________
1.the measurement of self-inductance
2.the measurement of resistance
3.the measurement of capacitance
4.the measurement of impedance
Posted Date:-2022-05-03 00:37:13
Anderson’s bridge is basically used for ________
1.measurement of capacitance
2.measurement of resistance
3.measurement of inductance
4.measurement of voltage
Posted Date:-2022-05-03 00:38:01
At high frequencies in an AC bridge, the source is _______
1.tuned amplifiers
2.oscillators
3.vibration galvanometer
4.high voltage source
Posted Date:-2022-05-03 00:21:02
At high frequency, source consists of ______
1.amplifiers
2. regulators
3.oscillators
4. op amps
Posted Date:-2022-05-03 00:17:36
At very low frequencies in a AC bridge, the source is ______
1. power line
2. e.m.f
3.galvanometer
4. tuned circuit
Posted Date:-2022-05-03 00:20:38
Bridge balance equation for magnitude is given by which of the following relation?
1.Z1 Z4 = Z2 Z3
2.Z1 Z2 = Z3 Z4
3. Z2 Z4 = Z1 Z3
4.Z1 Z3 = Z2 Z4
Posted Date:-2022-05-03 00:24:55
Bridge can be used at audio frequency.
1. True
2. False
3.all of the above
4.None of the mentioned
Posted Date:-2022-05-03 00:36:08
Bridge depends on frequency.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-05-03 00:35:50
Bridge is used for the measurement of _________
1.high Q factor
2.medium Q factor
3. low Q factor
4.very low Q factor
Posted Date:-2022-05-03 00:36:30
Bridge must be balanced for _____
1.magnitude
2.angle
3.magnitude and angle
4. power
Posted Date:-2022-05-03 00:25:25
For capacitive impedances, the phase angle is _______
1.tangential
2. negative
3.positive
4. logarithmic
Posted Date:-2022-05-03 00:29:42
For inductive impedances, the phase angle is _______
1. positive
2.negative
3. zero
4.exponential
Posted Date:-2022-05-03 00:26:17
For single frequency value, the most sensitive detector is ____
1.tuned detector
2.vibration galvanometer
3.headphone
4.oscillator
Posted Date:-2022-05-03 00:18:35
How is the bridge balanced?
1.using resistance R1
2.using resistance R1
3.through capacitance C3
4.through capacitance Cx
Posted Date:-2022-05-03 00:32:07
In a capacitance bridge, the arms are _________
1.resistive
2.capacitive
3.inductive
4.mixture of resistance, capacitance and inductance
Posted Date:-2022-05-03 00:31:20
In the simplest form, an AC bridge consists of _______
1.arms, source and a detector
2.arms and source
3. source and detector
4.arms and detector
Posted Date:-2022-05-03 00:13:54
Inductance comparison bridge is used to compute _____
1.unknown inductance and resistance
2.unknown resistance
3. unknown inductance
4.unknown capacitance
Posted Date:-2022-05-03 00:34:33
Inductance control is obtained by ______
1. using R2
2. using R1
3. using R1
4.using Lx
Posted Date:-2022-05-03 00:35:22
Phase angle is based on _______
1.source
2.detector
3. power
4. impedance
Posted Date:-2022-05-03 00:25:55
Ra and Rd are the opposite arms of a Wheatstone bridge as are Rc and Rb. The source voltage is applied across Ra and Rc. Then when the bridge is balanced which one of the following is true?
1. Ra = Rc Rd/Rb
2. Ra = Rc Rd/Rb
3.Ra = Rb Rd/Rc
4.Ra = Rb + Rc + Rd
Posted Date:-2022-05-03 00:05:51
Source is _______
1.dc supply
2.ac supply
3.mixed mode supply
4.high voltage supply
Posted Date:-2022-05-03 00:16:57
The frequency range of a typical oscillator is _______
1.1 Hz to 50 Hz
2. 1 kHz to 100 KHz
3.40 Hz to 125 kHz
4.1 MHz to 150 MHz
Posted Date:-2022-05-03 00:21:53
The output frequency of an oscillator is _______
1.unstable and fixed
2.stable and adjustable
3. stable and fixed
4.unstable and variable
Posted Date:-2022-05-03 00:23:17
The output power of an oscillator is not enough to drive power circuits.
1. True
2. False
3.all of the above
4.None of the mentioned
Posted Date:-2022-05-03 00:23:38
The power output for a typical oscillator is _____
1.1 kW
2.1 MW
3.1 mW
4. 7 W
Posted Date:-2022-05-03 00:22:21
The simultaneous applications of signals x (t) and y (t) to the horizontal and vertical plates respectively, of an oscilloscope, produce a vertical figure of 8 displays. If P and Q are constants and x(t) = P sin (4t + 30), then y(t) is equal to _____
1.Q sin (4t -30)
2.Q sin (2t +15)
3.Q sin (8t +60)
4.Q sin (4t +30)
Posted Date:-2022-05-03 00:09:56
Tuned amplifier circuits respond to broad bandwidth at bridge frequency.
1. True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-05-03 00:24:19
Tuned amplifiers can be set to _______
1. low frequencies
2.high frequencies
3.any frequency
4.audio frequencies
Posted Date:-2022-05-03 00:24:01
Unknown capacitance value is obtained by ______
1.comparison with standard
2.using a tuned detector
3.using capacitance of other ratio arms
4.using a vibration galvanometer
Posted Date:-2022-05-03 00:33:28
Vibration galvanometers are used for ____
1.very high frequency
2.very low frequency
3.low audio frequency
4.high audio frequency
Posted Date:-2022-05-03 00:19:25
What is the frequency range for a headphone as a detector?
1.20 Hz to 20 kHz
2. 10 kHz to 1 MHz
3.10 MHz to 1 GHz
4.250 Hz to 4 kHz
Posted Date:-2022-05-03 00:18:07
When a bridge is balanced?
1.no voltage drop across the circuit
2.power dissipation is high
3. temperature of the circuit is high
4.no current flows
Posted Date:-2022-05-03 00:30:40
When the capacitor used is imperfect, the inductance value changes.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-05-03 00:38:51