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Q1. | For a push pull circuit the most favoured biasing method is |

A. | self bias [Wrong Answer] |

B. | emitter bias [Wrong Answer] |

C. | diode bias [Correct Answer] |

D. | collector bias [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A Hartley oscillator is used for

very low frequencies

radio frequencies

micro wave frequencies

audio frequency

⇒ Average latency time of magnetic tape memory is of the order of

1 μ sec

1 msec

1 sec

1 minute

⇒

**Assertion (A):** For an underdamped system with damping ratio ξ, the maximum overshoot is *e*-ξp/(1-ξ^{2})^{0.5}

**Reason (R):** Peak time of a second order under damped system = p/ω_{d} where ω_{d} is frequency of damped oscillations.

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

⇒ Kirchoff's voltage law is not valid for a non-linear network

the statement is true

the statement is false

can't say

none of the above

⇒ In an induction wattmeter, the shading bands are made of non conducting material.

TRUE

FALSE

⇒ A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

100

99

1.01

0.99

⇒ Which of the following microphones has maximum distortion?

Ribbon

Condenser

Crystal

Carbon

⇒ The total number of leads in SCR, DIAC and TRIAC respectively are

3, 2, 3

2, 3, 3

3, 3, 2

3, 2, 4

⇒ Which of the following values represents the open loop gain of typical op-amp?

100

10000

100000

1000000

⇒ In 8085, the pairing of registers B, C, D, E, H, L is

B - C, D - E, H - L

B - D, C - E, H - L

B - C, D - L, H - E

B - H, D - E, C - L

⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

*t*

0.5 x

0.5 x

0.5 x

_{k}0.5 x*e*^{-3.5}0.5 x

*e*^{-5}0.5 x

*e*^{-7}0.5 x

*e*^{-10}

⇒ The minimum number of NAND gates required to implement the Boolean function A +AB + ABC is equal to

0

1

4

7

⇒ It is required to measure a low magnitude high frequency current. The proper instrument is

moving iron

dynamometer

thermocouple

induction

⇒ An amplifier signal is made up of just two frequencies 1000 Hz. The output signal consists of 500 Hz and 25000 Hz frequencies. This may be attributed to

harmonic distortion

intermodulation distortion

both (a) and (b)

none of the above

⇒ The range of a cordless telephone is about

1000 m

500 m

100 m

10 m

⇒ If N = 196, the result of the following program will be196

16

16

196

⇒ If a function

contains only sine terms

contains only cosine terms

contains a constant and sine terms

contains a constant and cosine

⇒ Radiation efficiency of an antenna is defined as the ratio of

Total power radiated by an antenna to the net power accepted by the antenna from the connected transmitter

The frequency at which minimum power is radiated to the frequency at which maximum power is radiated

Total power accepted from the transmitter to total power generated by the transmitter

Power in main lobe to that in the side lobe

⇒ The symbol in figure is

UJT

PUT

SCS

SBS

⇒

⇒ The minimum number of NAND gates required to implement the Boolean function A +AB + ABC is equal to

0

1

4

7

⇒ It is required to measure a low magnitude high frequency current. The proper instrument is

moving iron

dynamometer

thermocouple

induction

⇒ An amplifier signal is made up of just two frequencies 1000 Hz. The output signal consists of 500 Hz and 25000 Hz frequencies. This may be attributed to

harmonic distortion

intermodulation distortion

both (a) and (b)

none of the above

⇒ The range of a cordless telephone is about

1000 m

500 m

100 m

10 m

⇒ If N = 196, the result of the following program will be

16

16

196

⇒ If a function

*f*(*t*) is an odd, function, its Fourier seriescontains only sine terms

contains only cosine terms

contains a constant and sine terms

contains a constant and cosine

⇒ Radiation efficiency of an antenna is defined as the ratio of

Total power radiated by an antenna to the net power accepted by the antenna from the connected transmitter

The frequency at which minimum power is radiated to the frequency at which maximum power is radiated

Total power accepted from the transmitter to total power generated by the transmitter

Power in main lobe to that in the side lobe

⇒ The symbol in figure is

UJT

PUT

SCS

SBS

⇒

`JCOKE`

8

11

16

20

⇒ **Assertion (A):** A dc stabilizer has constant output voltage irrespective of variations in input voltage and load current

**Reason (R):** A dc series regulator uses a zener diode across the load to stabilize the output voltage.

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

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

A is correct R is wrong

A is wrong R is correct

⇒ In integral cycle control of ac regulators, the period of integral cycle control, *i*.*e*., (*m* + *n*) T should be

less than mechanical or thermal time constant of the system

more than the mechanical or thermal time constant of the system

more or less than the mechanical or thermal time constant

very high

⇒ In the circuit shown below, the op-amp is ideal, the transistor has V_{BE} = 0.6 V and β = 150. Decide whether the feedback in the circuit is positive or negative and determine the voltage V at the output of the op

Positive feedback, V = 10 V

Positive feedback, V = 0 V

Negative feedback, V = 5 V

Negative feedback, V = 2 V

⇒ If the oscillator output is modulated by audio frequencies upto 10 kHz, the frequency range occupied by the side bands will be

711.9 kHz to 712.1 kHz

702 kHz to 722 kHz

692 kHz to 732 kHz

71.2 kHz to 71.20 kHz

⇒ In an *n* type semiconductor the fermi level is 0.35 eV below the conduction band, the concentration of donor atoms is increased to three times. The new position of Fermi level will be

0.35 eV below conduction band

about 0.32 eV below conduction band

about 0.32 eV above conduction band

about 0.1 eV below conduction band

⇒ The expression for satellite link frequencies such as 4/6 GHz denotes that

4 GHz is the up-link and 6 GHz is the down-link frequency

4 GHz is the down-link and 6 GHz is the up-link frequency

the system operates at a mean frequency of 5 GHz

one frequency is used as a back up for the other

⇒ In a one pole active low pass filter, the cut off frequency is *f*_{c}. Then

gain decreases at the rate of 20 dB per decade increase in frequency above *f*_{c}

gain decreases at the rate of 20 dB per decade decrease in frequency below *f*_{c}

gain decreases at the rate of 40 dB per decade increase in frequency above *f*_{c}

gain decreases at the rate 40 dB per decade decrease in frequency below *f*_{c}

⇒ The current *i*(*t*) through a 10 Ω resistor in series with an inductance is given by *i*(*t*) = 3 + 4 sin (100*t* + 45°) + 4 sin (300*t* + 60°) Amperes. The RMS value of the current and the power dissipated in the circuit are

41 A, 410 W respectively

35 A, 350 W respectively

5 A, 250 W respectively

11 A, 1210 W respectively

⇒ In a BJT amplifier circuit the size of coupling capacitor depends on

lowest frequency

highest frequency

average of lowest and highest frequencies

none of the above

⇒ In a good voltage amplifier, its input impedance

must be high compared to the resistance of the source

must be low compared to the resistance of the source

must be equal to the resistance of the source

must be half the resistance of the source

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