All waves in electromagnetic spectrum has the same speed in vacuum.
1.True
2.False
3.all of the above
4.None of the mentioned
Amplification of low level signal can be done using_______
1.Electrometer amplifier
2.Difference amplifier
3.Inverting amplifier
4.Non inverting amplifier
In a dispersive medium, speed of light depends on frequency.
1.True
2.False
3.all of the above
4.None of the mentioned
In a time interval measuring device, two pulses are used _________
1.To produce triangular wave
2.To start and stop gate circuit
3. To produce sinusoidal signal
4.None of the mentioned
Phase difference between two voltages at frequencies above 10Hz can be measured using _____
1. CRO
2.Voltmeter
3. X-Y plotter
4. Multi meter
Rejection capability of Phase sensitive detector is depended on the averaging time of smoothing filter.
1.True
2.False
3.all of the above
4.None of the mentioned
What do you mean by duty cycle?
1. Ratio of on time and total time period
2.Ratio of off time and total time period
3.On time
4.Off time
What is the operating range of X-Y plotter?
1.Below 5Hz
2.Above 10Hz
3.Above 1 KHz
4.Very high frequency
Which of the following is the expression of power factor?
1.cos θ
2.sin θ
3. tan θ
4. sec θ
Which of the following relation is correct for phase angle and reactive power?
1.Reactive power = apparent power ∗ sin θ
2.Reactive power = apparent power ℠sin θ
3.Reactive power = Real power ∗ sin θ
4.Reactive power = Real power ℠sin θ
Which of the following represents the correct relationship between frequency and angular frequency?
1. ω=2πf
2.ω=πf
3.f=2πω
4.f=πω
Amplifier with power supply and output circuits galvanically isolated are called ______
1. Differential amplifier
2.Isolation amplifier
3. Inverting amplifier
4.None of the mentioned
Electrical network made up of resistor and inductor is a _______
1.Passive network
2.Active network
3.Low pass filter
4.High pass filter
For a ramp input in second order system, which of the following represents the correct relationship between natural frequency and steady state error?
1.Both are directly proportional
2.Both are inversely proportional
3.Both are equal
4.None of the mentioned
For an ideal op-amp, zero input results in zero output.
1.True
2. False
3.all of the above
4.None of the mentioned
For what purpose, FET’s are included in phase sensitive detectors?
1.As SPDT switches, for working with very high frequency signals
2.As SPDT switches, for working with very low frequency signals
3.As SPST switches, for working with very high frequency signals
4.As SPST switches, for working with very low frequency signals
In 741 IC, pin number 4 is represented by ______
1. Offset null
2.Positive input
3.Negative input
4.Negative supply
Measuring range is not an important parameter in TIM.
1. True
2.False
3.all of the above
4.None of the mentioned
Phase difference between two voltages at frequencies above 10Hz can be measured using _________
1. CRO
2.Voltmeter
3. X-Y plotter
4. Multi meter
Phase-Sensitive detectors are used for measuring phase of _______
1.Sinusoidal signals only
2.Non periodic signals only
3.Periodic signals only
4.Both periodic and non-periodic signals
Resistor is a ______ element.
1.Zero order
2.First order
3.Second order
4.None of the mentioned
Start and stop pulses are produced by ______
1.Gate circuit
2.Time discriminators
3.Oscillators
4.None of the mentioned
TDC and TIM are used for the same application.
1.True
2.False
3.all of the above
4.None of the mentioned
TDC devices are used for ______
1. Indicating frequency of signal
2.Indicating time delay in analog format
3.Indicating time delay in digital format
4.Indicating voltage level
Time require by the signal to reach 63% of amplitude is known as ______
1.Duty cycle
2.Time delay
3.Time constant
4.On time
Transfer function of a system is given by G(S) = b0 â„ a1S+a0. What will be the static sensitivity of system?
1.b0 â„ a0
2.b0 â„ a1
3.a0 â„ b0
4.a1 â„ b0
Transfer function of a system with input y(t) = t2/2 is given by 1/S. What will be the obtained output?
1.6t3
2.t3/6
3.t3
4. t4
Voltage follower is also known as ______
1.Unity gain amplifier
2.Differential amplifier
3.Comparator
4.None of the mentioned
What is the expression for phase angle using X-Y plotter? (Assume t0 be time interval between zero crossing of signals and T be time period of signals).
1. (360T0) â„ t0
2.(180 T0) â„ t0
3. (360 t0) â„ T0
4.(180 t0) â„ T0
What is the relation for phase angle (in degree) of a signal with time delay Δt and frequency f?
1.3600∗f.∗ Δt
2.1800∗f∗ Δt
3. 3600 ℠(f∗ Δt)
4.1800 ℠(f∗ Δt)
What is the use of a gate circuit in TIM?
1.To produce sinusoidal signal
2.To produce pulse signal
3.To on and off input signal
4.None of the mentioned
What is the use of flip-flop in electronic phase meters?
1.To provide a delay
2.To provide stability
3.To save data for particular time duration
4.To produce rectangular pulse
What is the use of PWM technology?
1. To amplify output voltage
2. To reduce output voltage
3. For controlling supply voltage
4.For measuring voltage
What will be the damping ratio of a system with transfer function G(S) = 5/(3S2+2S+3)?
1.1.5
2.0.5
3.0.33
4. 2
What will be the frequency of a system in which 35 events occur in 7 seconds?
1. 7Hz
2.35Hz
3. 5Hz
4. 10Hz
What will be the frequency of the signal A sin (4πt+ɸ)?
1.2Hz
2.0.5Hz
3.2Ï€Hz
4.4Ï€Hz
What will be the static sensitivity of a system with transfer function G(S) = 4/(5S2+8S+2)?
1.0.5
2.2
3. 4
4.4/5
What will be the time constant for a system represented by transfer function G(S) = 5/(3S+2)?
1.3
2.2.5
3. 1.5
4.2
When interpolation techniques are used?
1.When interpolation techniques are used?
2. For high resolution of measurement
3.For high range of measurement and high resolution of the measurement is required
4.Not the mentioned
Which configuration of op-amp is used for filter circuit?
1.Differential
2.Non-inverting
3.Inverting
4.None of the mentioned
Which of the following cannot be treated as a requirement of the instrumentation amplifier?
1.Low drift
2. Low input impedance
3.High linearity
4.High CMRR
Which of the following cannot be used as a unit for frequency?
1.Hz
2.BPM
3.RPM
4.S
Which of the following device can be used for measurement of frequency?
1.Voltmeter
2.Ammeter
3.Stroboscope
4.None of the mentioned
Which of the following frequency range represents an audible frequency range of humans?
1.Below 20Hz
2.Between 20Hz and 20 KHz
3.Above 20 KHz
4.All of the Mentioned
Which of the following is the correct relationship between speed of light in vacuum and frequency of light?
1.c=fλ
2. c=f
3.λ=cf
4. c=λ2
Which of the following range represents frequency range of rainbow colors?
1.Below 4×1014Hz
2.Between 4×1014Hz and 8×1014Hz
3.Above 8×1014Hz
4.Between 0Hz and 8×1014Hz
Which of the following represent condition for an over-damped system?
1.Damping ratio<0
2.Damping ratio=0
3.Damping ratio=0.5
4.Damping ratio>1
Which of the following represents a system with transfer function G(S) = 5/(3S2+8S+3) ?
1.Over damped system
2.Un-damped system
3.Under damped system
4.None of the mentioned
Which of the given factor determines the order of a system?
1.Maximum power of ‘S’ in the characteristic equation
2.Minimum power of ‘S’ in the characteristic equation
3.Value of constant value
4.None of the mentioned
Which of the given statement is true for a zero-order system?
1.Varying transfer function with time
2.Constant transfer function
3.Transfer function = 1/S
4.Transfer function = 1/s2