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Q1. | RMS value of i(t) = 10[1 + sin (- t)] is |

A. | 10 [Wrong Answer] |

B. | 10/2 [Wrong Answer] |

C. | l50 [Correct Answer] |

D. | 102 [Wrong Answer] |

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

⇒

**Assertion (A):** A decrease in temperature increases the reverse saturation current in a *p*-*n* diode.

**Reason (R):** When a diode is reverse biased surface leakage current flows.

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

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

A is true but R is false

A is false but R is true

⇒ N circles for a = a

_{1}, and a = a

_{1}± 180°

*n*(where

*n*= 1, 2, 3, ....) are the same.

TRUE

FALSE

⇒ Consider the following statements about directional coupler shown in the fi

1 and 2 only

3 and 4 only

1, 2 and 3

2, 3 and 4

⇒ Which of the following circuits come under the class of combinational logic circuits?

- Full adder
- Full subtractor
- Half adder
- J-K flip-flop
- Counter

1 only

3 and 4

4 and 5

1, 2 and 3

⇒ In the circuit, V

_{s}= 10 cos ω

*t*, power drawn by the 4Ω resistor is 8 watt. The power facto

1

0.5

0.85

0

⇒ For the characteristic equation

*s*

^{5}+

*s*

^{4}+ 2

*s*

^{3}+ 2

*s*

^{2}+ 3

*s*+ 15 = 0, the number of roots in left half

*s*plane are

1

2

3

5

⇒ An RC oscillator uses

one RC combination

two RC combinations

at least three RC combinations

either (a) or (b)

⇒ Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?

Variable tuning inductor

Ganged tuning inductor

Variable capacitor

Variable preset

⇒ 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 a thyristor is conducting, the voltage drop across it

is absolutely constant

decreases with increase in load current

increases slightly with increase in load current

none of the above

⇒ The feedback control system shown in figure is sta

for all K ≥ 0

only if K ≥ 1

only if 0 ≤ K < 1

only if -1 ≤ K < 1

⇒ A current source inverter has simple commutation circuit.

TRUE

FALSE

⇒ In a TWT the axial component of electric field advances along the tube

at a velocity that is almost equal to speed of light

at a velocity that is a small fraction of speed of light

at a velocity that is about 50% of speed of light

at a velocity that may be even more than speed of light

⇒ The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is

-256

-128

-255

-127

⇒ A variable reluctance tachometer has 180 teeth on rotor. The speed of shaft on which it is mounted in 1200 rpm. The frequency of output pulses is

1800 per second

3600 per second

4800 per second

5600 per second

⇒ A single phase bridge type cycloconverter uses eight thyristors.

TRUE

FALSE

⇒ The load impedance Z

_{L}of a CE amplifier has R and L in series. The phase difference between output and input will be

180°

0

more than 90° but less than 180°

more than 180° but less than 270°

⇒ A Hartley oscillator uses FET with

*g*

*of 2 ms and*

_{m}*r*

*= 2 KΩ. The total coil inductance is 10 μH with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB.*

_{d}7.11 MHz, 13.97 dB

7.3 MHz, 14.1 dB

6.93 MHz, 12.9 dB

7.4 MHz, 13 dB

⇒ The reason for glitches on the outputs of decoding gates on a synchronous counter is

FFs changing states together

FFs changing states one at a time

AND gates not functioning properly

none of the above

⇒ In the given figure the input frequency is such that

*R*<<

*X*,

_{c}*v*

_{0}lags

*v*

_{i}by 90°

*v*

_{0}leads

*v*

_{i}by 90°

*v*

_{0}and

*v*

*are in phase*

_{i}either (b) or (c)

⇒ Beamwidth of an antenna depends upon

shape of radiation pattern

dimensions

wavelength

all of the above

⇒ With on-chip decoding,

*n*address lines can access

2

*n*memory locations

2

*n*

^{2}memory locations

2

*memory locations*

^{n}*n*

^{2}memory location

⇒ Multiple member of antennas are arranged in arrays in order to enhance what property?

Both directivity and bandwidth

Only directivity

Only bandwidth

Neither directivity nor bandwidth

⇒ A function is given

*f*(

*t*) = sin

^{2}

*t*+ cos

^{2}

*t*. Which of the following is true?

f has frequency components at 0 and 1/2p Hz

f has frequency components at 0 and 1/p Hz

f has frequency components at 1/2p and 1/p Hz

f has frequency components at 0, l/2p and 1/p Hz

⇒ What will be output for decimal input 82?

0.82 V

8 V

0.1 V

10 mV

⇒ In a communication system, noise is most likely to affect the signal

at the receiver

at the transmitter

at the information source

in the channel

⇒ Greatest mobility can be expected in case of

holes

protons

electrons

negative ions

⇒ If

*f*(

*t*) = 1, F(

*j*ω) =

2p

p

2pδ (p)

pδ (ω)

⇒ For an ideal antenna, numerical value of directivity must be

∞

0

1

any value

⇒ Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of

15 Ω

5 Ω

5/3 Ω

45 Ω