A rectifier type AC voltmeter consists of a series resistance R, an ideal full-wave rectifier bridge and a PMMC instrument. A DC current of 1 mA produces a full-scale deflection of the instrument. The resistance of the instrument is 100 Ω. A voltage of 100 V (rms) is applied to the input terminals. The value of R required is?
1.63.56 Ω
2.89.83 Ω
3.89.83 kΩ
4.141.3 kΩ
Posted Date:-2022-06-03 10:25:13
For any given signal, average power in its 8 harmonic components as 50 mW each and fundamental component also has 50 mV power. Then, average power in the periodic signal is _______________
1.750
2.400
3.100
4. 50
Posted Date:-2022-06-03 10:42:47
The value of 2 [u (t – 1) – u (1 – 2t)] (u ( t + 1) + u (t)) at t = 3 sec is ____________
1.0
2.4
3.∞
4.1
Posted Date:-2022-06-03 10:29:28
A 1 μF capacitor is connected across a 50 V battery. The battery is kept closed for a long time. The circuit current and voltage across capacitor is __________
1.0.5 A and 0 V
2.0 A and 50 V
3.20 A and 5 V
4.0.05 A and 5 V
Posted Date:-2022-06-03 10:37:21
A 3 phase balanced supply feeds a 3-phase unbalanced load. Power supplied to the load can be measured by ___________
1.2 Wattmeter and 1 Wattmeter
2.2 Wattmeter and 3 Wattmeter
3.2 Wattmeter and 2 Wattmeter
4.Only 3 Wattmeter
Posted Date:-2022-06-03 10:59:56
A capacitor of 110 V, 50 Hz is needed for AC supply. The peak voltage of the capacitor should be ____________
1.110 V
2.460 V
3.220 V
4.230 V
Posted Date:-2022-06-03 10:44:28
A capacitor stores 0.15C at 5 V. Its capacitance is ____________
1.0.75 F
2.0.75 μF
3.0.03 F
4.0.03 μF
Posted Date:-2022-06-03 11:00:33
A constant k band pass filter has a pass band from 100 to 400 Hz. The resonant frequency of series and shunt arms is ____________
1.300 Hz
2.250 Hz
3.200 Hz
4.150 Hz
Posted Date:-2022-06-03 10:39:05
A rectifier type AC voltmeter consists of a series resistance R, an ideal full-wave rectifier bridge and a PMMC instrument. The internal resistance and a full-scale deflection produced by a DC current are 100 Ω and 1 mA respectively. A voltage of 100 V (rms) is applied to the input terminals. The value of R required is _________
1.63.56 Ω
2.89.83 Ω
3.89.83 kΩ
4.141.3 kΩ
Posted Date:-2022-06-03 10:36:44
A relay coil having voltage of magnitude 210 V and frequency 50 Hz is connected to a 210 V, 50 Hz supply. If it has resistance of 50 Ω and an inductance of 0.2 H, the apparent power is _____________
1.549.39 VA
2.275.6 VA
3.157 VA
4.187 VA
Posted Date:-2022-06-03 10:24:22
A two branch parallel circuit has a 50 Ω resistance and 10 H inductance in one branch and a 1 μF capacitor in the second branch. It is fed from 220 V ac supply, at resonance, the input impedance of the circuit is _____________
1.447.2 Ω
2.500 Ω
3.235.48 Ω
4.325.64 Ω
Posted Date:-2022-06-03 10:45:45
A voltage having the waveform of a sine curve is applied across a capacitor. When the frequency of the voltage is increased, what happens to the current through the capacitor?
1.Increases
2.Decreases
3.Remains same
4.Is zero
Posted Date:-2022-06-03 10:22:54
An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is ___________
1.7.07 Ω
2.10 Ω
3. 14.14 Ω
4.20 Ω
Posted Date:-2022-06-03 10:41:29
Barlett’s Bisection Theorem is applicable to ___________
1.Unsymmetrical networks
2.Symmetrical networks
3.Both unsymmetrical and symmetrical networks
4.Neither to unsymmetrical nor to symmetrical networks
Posted Date:-2022-06-03 10:30:02
For a transmission line, open circuit and short circuit impedances are 10 Ω and 20 Ω. Then characteristic impedance is ____________
1.100 Ω
2.50 Ω
3.25 Ω
4.200 Ω
Posted Date:-2022-06-03 11:01:09
Given a sinusoidal voltage that has a peak to peak value of 100 V. The RMS value of the sinusoidal voltage is ___________
1.50 V
2.70.7 V
3.35.35 V
4. 141.41 V
Posted Date:-2022-06-03 10:31:26
Given I (t) = 10[1 + sin (- t)]. The RMS value of I(t) is ____________
1.10
2. 5
3.150−−−√
4.105
Posted Date:-2022-06-03 10:45:11
In a dual slop integrating type digital voltmeter, the first integrating is carried out for 10 periods of the supply frequency of 50 Hz. If the reference voltage used is 2 V, the total conversion time for an input of 1 V is _________
1.0.01 s
2.0.05 s
3.0.1 s
4.1 s
Posted Date:-2022-06-03 10:36:07
In a dual slop integrating type digital voltmeter, the first integrating is carried out for 50 periods of the supply frequency of 50 Hz. If the reference voltage used is 10 V, the total conversion time for an input of 40 V is?
1.3 s
2. 2 s
3.4 s
4.1 s
Posted Date:-2022-06-03 10:32:09
In a two terminals network the open circuit voltage measured at the given terminals is 110 V and short circuit currents at the same terminals 10 A. If a load of 50 Ω resistance is connected at the terminals, load current is ___________
1.1.8 A
2.1.25 A
3. 6 A
4.6.25 A
Posted Date:-2022-06-03 10:40:57
In an AC circuit, the maximum and minimum values of power factor can be ___________
1.2 and 0
2.1 and 0
3.0 and -1
4.1 and -1
Posted Date:-2022-06-03 10:58:39
In an unloaded transformer, the flux limiting the primary is 10 mWb and secondary is 30 mWb. The coefficient of coupling is ____________
1.1
2. 0.1
3.0.33
4.0.67
Posted Date:-2022-06-03 10:39:40
In the bilateral Laplace transform, the lower limit is?
1.0
2.1
3.∞
4. – ∞
Posted Date:-2022-06-03 10:12:22
Let us assume x (t) = A cos(ωt + φ), What is the final steady state solution for y (t)?
1.A|H(jω)|cos[ωt+Ø+ θ (ω)]
2.A|H(jω)|cos[ωt-Ø+ θ (ω)]
3. A|H(jω)|cos[ωt-Ø- θ (ω)]
4.A|H(jω)|cos[ωt+Ø- θ (ω)]
Posted Date:-2022-06-03 10:17:00
Poles and zeros of a driving point function of a network are simple and alternate on jω axis. The network consists of ___________
1.R and C
2.L and C
3.R and L
4.R, L and C
Posted Date:-2022-06-03 10:40:23
The coefficients of the polynomials P (S) and Q (S) in the network function N (S) are ________ for passive network.
1.real and positive
2. real and negative
3.complex and positive
4.complex and negative
Posted Date:-2022-06-03 11:10:06
The current rating of a cable depends on ___________
1.Length of the cable
2.Diameter of the cable
3.Both length and diameter of the cable
4.Neither length nor diameter of the cable
Posted Date:-2022-06-03 10:53:47
The Current Transformer supplies current to the current coil of a power factor meter, energy meter and, an ammeter. These are connected as?
1.All coils in parallel
2.All coils in series
3.Series-parallel connection with two in each arm
4.Series-parallel connection with one in each arm
Posted Date:-2022-06-03 10:43:23
The electrical energy required to heat a bucket of water to a certain temperature is 10 kWh. If heat losses, are 10%, the energy input is ____________
1.2.67 kWh
2.3 kWh
3.2.5 kWh
4.3.5 kWh
Posted Date:-2022-06-03 10:53:08
The equivalent transform circuit contains an admittance of value ____ and equivalent transform current source.
1.1/L
2.1/sL
3.L
4.sL
Posted Date:-2022-06-03 11:05:54
The imaginary part of the complex frequency is called?
1.angular frequency
2.sampling frequency
3.neper frequency
4.radian frequency
Posted Date:-2022-06-03 11:02:57
The impedance matrices of two, two-port network are given by [3 2; 2 3] and [15 5; 5 25]. The impedance matrix of the resulting two-port network when the two networks are connected in series is ____________
1.[3 5; 2 25]
2.[18 7; 7 28]
3.[15 2; 5 3]
4.Indeterminate
Posted Date:-2022-06-03 10:46:30
The impedance of an RC series circuit is 12 Ω at f = 50 Hz. At f = 200 Hz, the impedance will be?
1.More than 12
2.Less than 3
3.More than 3 Ω but less than 12 Ω
4.More than 12 Ω but less than 24 Ω
Posted Date:-2022-06-03 10:59:17
The ratio of the current transform at one port to current transform at other port is called?
1.Transfer admittance
2.Transfer impedance
3.Current transfer ratio
4.Voltage transfer ratio
Posted Date:-2022-06-03 11:08:46
The ratio of transform current to the transform voltage is defined as ________ of the resistor.
1.transform admittance
2.transform impedance
3.transform current
4.transform voltage
Posted Date:-2022-06-03 11:04:13
The ratio of transform voltage to the transform current is defined as _________ of the resistor.
1.transform voltage
2.transform current
3.transform impedance
4. transform admittance
Posted Date:-2022-06-03 11:03:38
The ratio of voltage transform at first port to the voltage transform at the second port is called?
1.Voltage transfer ratio
2.Current transfer ratio
3.Transfer impedance
4.Transfer admittance
Posted Date:-2022-06-03 11:08:12
The ratio of voltage transform at the first port to the current transform at the second port is called?
1.Voltage transfer ratio
2.Transfer admittance
3.Current transfer ratio
4.Transfer impedance
Posted Date:-2022-06-03 11:09:22
The real part of the complex frequency is called?
1.radian frequency
2.neper frequency
3.sampling frequency
4.angular frequency
Posted Date:-2022-06-03 11:02:10
The relation between current and voltage in the case of inductor is?
1.v=Ldt/di
2.v=Ldi/dt
3.v=dt/di
4.v=di/dt
Posted Date:-2022-06-03 10:14:24
The resistance element __________ while going from the time domain to frequency domain.
1.does not change
2.increases
3. decreases
4.increases exponentially
Posted Date:-2022-06-03 10:13:47
The resistance of a 230 V, 100 W lamp is ____________
1.529 Ω
2.2300 Ω
3.5290 Ω
4.23 Ω
Posted Date:-2022-06-03 10:38:00
The transfer function of a system having the input as X(s) and output as Y(s) is?
1.Y(s)/X(s)
2.Y(s) * X(s)
3.Y(s) + X(s)
4.Y(s) – X(s)
Posted Date:-2022-06-03 10:15:54
The transform admittance of the capacitor is?
1.1/sC
2.sC
3.1/C
4.C
Posted Date:-2022-06-03 11:07:04
The transform admittance of the inductor is?
1.1/sL
2. sL
3.1/L
4.L
Posted Date:-2022-06-03 11:05:22
The transform impedance of the capacitor is?
1.C
2.1/C
3.sC
4. 1/sC
Posted Date:-2022-06-03 11:06:26
The transform impedance of the inductor is?
1.L
2.1/L
3.sL
4.1/sL
Posted Date:-2022-06-03 11:04:48
The voltage and current in a capacitor are related as?
1.i=Cdt/dv
2.v=Cdv/dt
3.i=Cdv/dt
4.v=Cdt/dv
Posted Date:-2022-06-03 10:15:02
Two coils having self-inductances of 1 mH and 2 mH are mutually coupled. The maximum possible mutual inductance is ___________
1.1.414 mH
2. 2 mH
3.1 mH
4. 5.5 mH
Posted Date:-2022-06-03 10:38:33
Two similar coils have self-inductance of 20 mH each. Coefficient of coupling is 0.4. The mutual inductance M is ______________
1.2.5 mH
2.8 mH
3.7 mH
4. 1 mH
Posted Date:-2022-06-03 10:42:06