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Q1. | In Z_{RC}(s) has a pole at s = 0, the first element in second Foster realization is |

A. | R [Correct Answer] |

B. | C [Wrong Answer] |

C. | R and C in series [Wrong Answer] |

D. | R and C in parallel [Wrong Answer] |

View Answer
Explanation:-
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**Also Read Similar Questions Below :**

⇒ For a BJT, under the saturation condition,

I

_{C}= βI

_{B}

I

_{C}= aI

_{B}

I

_{C}is independent of all other parameters

I

_{C}< βI

_{B}

⇒ In a satellite system circular polarization is to be obtained. The antenna used is

parabolic

horn

log periodic

helical

⇒ Compared to bipolar junction transistor, a JFET has

lower input impedance

high input impedance and high voltage gain

higher voltage gain

high input impedance and low voltage gain

⇒ A speech signal, band limited to 4kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits. Assuming the signal to be uniformly distributed between its peak values, the signal to noise ratio at the quantizer output is

156 dB

32 dB

48 dB

64 dB

⇒ Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figu

-0.6

-1

0.6

0

⇒ Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?

Measurement of unknown voltage

Measurement of resistance

Measurement of unknown current

Calibration of voltmeter

⇒ In an op-amp a virtual ground is a ground for

voltage only

current only

both voltage and current

neither voltage nor current

⇒ It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude

will increase

will decrease

will remain constant

will reduce to negligible value

⇒ A telephone user while talking to a person via a satellite has to wait for reply for about __________ millisecond.

100

270

470

540

⇒ A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is I

_{s}and rms value of load current in I

_{rms}. Then

I

_{s}= I

_{rms}irrespective of the value of firing angle

I

_{s}= 0.5 I

_{rms}irrespective of the value of firing angle

I

_{s}= I

_{rms}if firing angle is less than 30°

I

_{s}= I

_{rms}if firing angle is more than 30°

⇒

**Assertion (A):** Feedback control systems offer more accurate control than open loop systems.

**Reason (R):** The feedback path establishes a link for comparison of input and output and subsequent error correction.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct but R is wrong

R is correct but A is wrong

⇒ A constant

*k*low pass T section filter has a characteristic impedance of 600 p at zero frequency. At

*f*=

*f*

_{c}the characteristic impedance is

600 Ω

zero

infinite

more than 600 ohms

⇒ In fabricating silicon BJT in ICs by the epitaxial process, the number of diffusions used is usually

2

3

4

6

⇒ In a series circuit with fixed R and variable X

_{L}, the current locus lies in the fourth quadrant.

TRUE

FALSE

⇒ For a standard 2nd order system the maximum overshoot is 10% to an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:

maximum overshoot doubles and percentage of maximum overshoot is less than double

maximum overshoot doubles and percentage of maximum overshoot do not change

maximum overshoot remain same and percentage of maximum overshoot is double

maximum overshoot more than double and percentage of maximum overshoot is less than double

⇒ In a purely capacitive circuit, the current __________ the voltage by __________ .

lags, 0°

leads, 90°

lags, 90°

lags, 45°

⇒ In cell communication

carrier frequency change

carrier frequency constant

depend upon location

depend upon geographical area

⇒ The first critical frequency nearest the origin of the complex frequency plane for an RL driving point impedance will be

a zero in left half plane

a zero in right half plane

a pole in left half plane

a pole or zero in left half plane

⇒ In phase modulation, the phase deviation is

proportional to the amplitude of the signal and varies with frequency

remains constant while amplitude and frequency of signal varies

proportional to the amplitude of the signal and independent of the frequency

none of the above

⇒ A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What must be the minimum gain of the oscillator to provide oscillations?

40

60

100

130

⇒ How many different binary numbers can be stored in a register consisting of six switches?

16

32

64

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⇒ For satellite transmission, analog signals may be converted into digital form with the help of

modem

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⇒ The dynamic resistance of a forward biased

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*n*diode

varies inversely with current

varies directly with current

is constant

is either constant or varies directly with current

⇒ In a CRO the Y plates are oriented

horizontally

vertically

at an angle of 20° of horizontal

at an angle of 70° of horizontal

⇒ Consider the following statements:

- If any root of characteristic equation has a positive real part the impulse response is unbounded and system is unstable.
- If all the roots of a characteristic equation have negative real parts, the impulse response decays to zero.
- If one or more non-repeated roots of characteristic equation are on
*j*ω axis impulse response is bounded but the system is unstable.

1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be

0.1

10.15

0.4

0.5

⇒

**Assertion (A):** Laplace transform can be used to evalute integrals.

**Reason (R):** Laplace transform can be used to solve differential equations.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ For stable network, the real part of poles and zeros of driving point function must be

negative

negative or zero

zero

positive

⇒ A pulsed radar produces 1 μ sec pulses at a rate of 1000 per second. The duty cycle is

0.001

0.01

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1

⇒ The analog signal given below is sampled by 600 samples per se

600 Hz

120 Hz

300 Hz

360 Hz