R4RIN – MCQs, Mock Tests | Electrical engineering Network Theory MCQs Set-7

Consider a circuit having a charge of 600 C, which is delivered to 100 V source in a 1 minute. The value of Voltage source V is ___________

1. 30 V
2. 60 V
3. 120 V
4. 240 V

✅ Correct Answer: 4

A resistor of 10 kΩ with the tolerance of 5% is connected in series with 5 kΩ resistors of 10% tolerance. What is the tolerance limit for a series network?

1. 9%
2. 12.04%
3. 8.67%
4. 6.67%

✅ Correct Answer: 4

A 200 μA ammeter has an internal resistance of 200 Ω. The range is to be extended to 500μA. The shunt required is of resistance __________

1. 20.0 Ω
2. 22.22 Ω
3. 25.0 Ω
4. 50.0 Ω

✅ Correct Answer: 3

A voltmeter has a sensitivity of 1000 Ω/V reads 200 V on its 300 V scale. When connected across an unknown resistor in series with a millimeter, it reads 10 mA. The error due to the loading effect of the voltmeter is

1. 3.33%
2. 6.67%
3. 13.34%
4. 13.67%

✅ Correct Answer: 2

The value of one decibel is equal to?

1. 0.115 N
2. 0.125 N
3. 0.135 N
4. 0.145 N

✅ Correct Answer: 1

A filter that passes frequencies between two designated cut-off frequencies and attenuates all other frequencies is called?

1. high pass filter
2. band elimination filter
3. band pass filter
4. low pass filter

✅ Correct Answer: 3

A filter that passes all frequencies lying outside a certain range, while it attenuates all frequencies between the two designated frequencies is called?

1. low pass filter
2. high pass filter
3. band elimination filter
4. band pass filter

✅ Correct Answer: 3

The relation between α, β, ϒ is?

1. α = ϒ + jβ
2. ϒ = α + jβ
3. β = ϒ + jα
4. α = β + jϒ

✅ Correct Answer: 2

The value of β in the attenuation band of constant k-low pass filter is?

1. 0
2. π
3. π/2
4. π/4

✅ Correct Answer: 2

The value of α in the pass band of constant k-low pass filter is?

1. π
2. π/4
3. π/2
4. 0

✅ Correct Answer: 4

Given a m-derived low pass filter has cut-off frequency 1 kHz, design impedance of 400Ω and the resonant frequency of 1100 Hz. Find the value of k.

1. 400
2. 1000
3. 1100
4. 2100

✅ Correct Answer: 1

Given a m-derived low pass filter has cut-off frequency 1 kHz, design impedance of 400Ω and the resonant frequency of 1100 Hz. Find the value of m.

1. 0.216
2. 0.316
3. 0.416
4. 0.516

✅ Correct Answer: 3

The value of N in dB is?

1. N = anti log(dB)
2. N = anti log(dB/10)
3. N = anti log(dB/20)
4. N = anti log(dB/40)

✅ Correct Answer: 3

An inverse network may be obtained by?

1. Converting each series branch into another series branch
2. Converting each series branch into another parallel branch
3. Converting each parallel branch into another series branch
4. None of the mentioned

✅ Correct Answer: 3

The value of N in terms of attenuation D is?

1. antilog(D)
2. antilog(D/10)
3. antilog(D/20)
4. antilog(D/40)

✅ Correct Answer: 2

The input to output power ratio of the load (N) is the ratio of the________ to the __________

1. Maximum power delivered to the load when the equalizer is not present, power delivered to the load when equalizer is present
2. Power delivered to the load when equalizer is present, maximum power delivered to the load when the equalizer is not present
3. Maximum power delivered to the load when the equalizer is present, power delivered to the load when equalizer is not present
4. Power delivered to the load when equalizer is not present, maximum power delivered to the load when the equalizer is present

✅ Correct Answer: 1

The N is defined as?

1. output power/ input power
2. input power/ output power
3. output power at inductor/ input power
4. output power at capacitor/ input power

✅ Correct Answer: 2

The propagation constant of a symmetrical T-section and π-section are the same.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The attenuation is not sharp in the stop band for an m-derived filter.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The bridged-T phase equalizer consists of?

1. Only pure inductors
2. Only pure capacitors
3. Only pure resistors
4. Only pure reactance

✅ Correct Answer: 3

In which of the filter circuits given below, will the bandwidth be equal to the critical frequency?

1. Low-pass
2. High-pass
3. Band-pass
4. Band-stop

✅ Correct Answer: 1

A Low-pass filter circuit has a cut-off frequency of 1.23 kHz. The bandwidth of the filter is ______________

1. 2.46 kHz
2. 1.23 kHz
3. 0.615 kHz
4. 3.69 kHz

✅ Correct Answer: 2

For providing a Roll-off greater than 20dB/decade/pole, filters with which characteristics are useful?

1. Butterworth
2. Chebyshev
3. Bessel
4. Butterworth & Bessel

✅ Correct Answer: 2

In a parallel RL circuit, 10 A current enters into the resistor R and 15 A current enters into the Inductor L. The total current I is _____________

1. 15.5 A
2. 25.05 A
3. 18.03 A
4. 30.15 A

✅ Correct Answer: 3

A thermistor is used for ____________

1. Over voltage protection
2. Temperature alarm circuit
3. Automatic light control
4. Automatic sensor

✅ Correct Answer: 2

For a Band Pass Filter, the slope of the filter is given as 80dB/decade. The order of the Band Pass Filter is __________

1. 10
2. 8
3. 4
4. 6

✅ Correct Answer: 2

For providing a Roll-off greater than 60dB/decade/pole, filters with which characteristics are useful?

1. Butterworth
2. Chebyshev
3. Bessel
4. Butterworth & Bessel

✅ Correct Answer: 2

A Low-pass filter circuit has a cut-off frequency of 50 kHz. The bandwidth of the filter is ______________

1. 24.6 kHz
2. 50 kHz
3. 61.5 kHz
4. 36.9 kHz

✅ Correct Answer: 2

For a Band Pass Filter, the slope of the filter is given as 40dB/decade. The order of the Band Pass Filter is __________

1. 2
2. 3
3. 4
4. 6

✅ Correct Answer: 3

The denominator polynomial in a transfer function may not have any missing terms between the highest and the lowest degree, unless?

1. all odd terms are missing
2. all even terms are missing
3. all even or odd terms are missing
4. all even and odd terms are missing

✅ Correct Answer: 2

The roots of the odd and even parts of a Hurwitz polynomial P (s) lie on ____________

1. right half of s plane
2. left half of s-plane
3. on jω axis
4. on σ axis

✅ Correct Answer: 3

If the polynomial P (s) is either even or odd, then the roots of P (s) lie on __________

1. on σ axis
2. on jω axis
3. left half of s-plane
4. right half of s plane

✅ Correct Answer: 2

If the ratio of the polynomial P (s) and its derivative gives a continued fraction expansion with ________ coefficients, then the polynomial P (s) is Hurwitz.

1. all negative
2. all positive
3. positive or negative
4. positive and negative

✅ Correct Answer: 2

When s is real, the driving point impedance function is _________ function and the driving point admittance function is _________ function.

1. real, complex
2. real, real
3. complex, real
4. complex, complex

✅ Correct Answer: 2

The poles and zeros of driving point impedance function and driving point admittance function lie on?

1. left half of s-plane only
2. right half of s-plane only
3. left half of s-plane or on imaginary axis
4. right half of s-plane or on imaginary axis

✅ Correct Answer: 3

The real parts of the driving point function Z (s) and Y (s) are?

1. positive and zero
2. positive
3. zero
4. positive or zero

✅ Correct Answer: 4

For the complex zeros to appear in conjugate pairs the poles of the network function are ____ and zeros of the network function are ____________

1. complex, complex
2. complex, real
3. real, real
4. real, complex

✅ Correct Answer: 3

Based on the location of zeros and poles, a reactive one-port can have ____________ types of frequency response.

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 4

A driving point impedance with poles at ω = 0, ω = ∞ must have ___________ term in the denominator polynomial.

1. s
2. s+1
3. s+2
4. s+3

✅ Correct Answer: 1

A driving point impedance with zeros at ω = 0, ω = ∞ must have ___________ term in the numerator polynomial.

1. s+3
2. s+2
3. s+1
4. s

✅ Correct Answer: 4

A driving point impedance with zero at ω = 0 and pole at ω = ∞ must have ___________ term in the numerator polynomial.

1. s+1
2. s
3. s+3
4. s+2

✅ Correct Answer: 2

A driving point impedance with pole at ω = 0 and zero at ω = ∞ must have ___________ term in the denominator polynomial.

1. s
2. s+3
3. s+1
4. s+2

✅ Correct Answer: 1

A capacitor, used for power factor correction in a single phase circuit decreases which of the following?

1. Power factor
2. Line current
3. Both Line current and Power factor
4. Neither Line current nor Power factor

✅ Correct Answer: 2

For making a capacitor, the dielectric should have __________

1. High relative permittivity
2. Low relative permittivity
3. Relative permittivity = 1
4. Relative permittivity neither too high nor too low

✅ Correct Answer: 1

The resistance of a thermistor decreases with increases in __________

1. temperature
2. circuit
3. light control
4. sensors

✅ Correct Answer: 2

Two capacitors of 0.5 μF and 1.5 μF capacitance are connected in parallel across a 110 V dc battery. The charges across the two capacitors after getting charged is ___________

1. 55 μC each
2. 275 μC each
3. 55 μC and 275 μC respectively
4. 275 μC and 55 μC respectively

✅ Correct Answer: 3

When a lead acid battery is being charged, the specific gravity of the electrolyte will ___________

1. Decrease
2. Increase
3. Either Increase or Decrease
4. Neither Increase nor Decrease

✅ Correct Answer: 2

A series RLC circuit has a resonant frequency of 550 Hz. The maximum voltage across C is likely to occur at a frequency of ___________

1. 1000 Hz
2. 2000 Hz
3. 1025 Hz
4. 500 Hz

✅ Correct Answer: 4

The current wave shape is in the form of a square terminating at t = 4sec. The voltage across the element increases linearly till t = 4 sec and then becomes constant. The element is ____________

1. Resistance
2. Inductance
3. Capacitance
4. Semi-conductor

✅ Correct Answer: 3

In a parallel RL circuit, 12 A current enters into the resistor R and 16 A current enters into the Inductor L. The total current I the sinusoidal source is ___________

1. 25 A
2. 4 A
3. 20 A
4. Cannot be determined

✅ Correct Answer: 2