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Q1. | In CE approximation, the upper end of d.c. load line is called the __________ point and the lower end is the __________ point. |

A. | Q, base [Wrong Answer] |

B. | base, Q [Wrong Answer] |

C. | saturation, cut off [Correct Answer] |

D. | cut off, saturation [Wrong Answer] |

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

⇒ When a series RL circuit having power factor angle 0 is switched on to an ac voltage V

_{m}sin (ω

*t*+ Φ), the transient term is zero if Φ = 0.

TRUE

FALSE

⇒ A signal is sampled at Nyquist rate

*f*= 2

_{s}*f*

_{0}. The function can be recovered from its samples only. If it is a

Periodic square wave of fundamental frequency

*f*

_{0}

Triangular wave of fundamental frequency

*f*

_{0}

Periodic sine wave of fundamental frequency

*f*

_{0}

Unit impulse function

⇒ An 8085 executes the following instructions

PC = 30A0H HL = 2715H

PC = 6104 H HL = 6140 H

PC = 6140H HL = 2715H

⇒ Figure shows four D type FFs are connected as a shift register using an XOR gate. The initial state and 3 subsequent states for 3 clock pulses are also g

0

1111

1001

1000

⇒ In what condition does BJT act like an open switch

cut off

saturation

active

both (b) and (c)

⇒ For a quadratic factor in transfer function the phase angle is not a function of damping factor.

TRUE

FALSE

⇒

**Assertion (A):** When Diode used as rectifier the reverse breakdown voltage should not be exceeded.

**Reason (R):** A high inverse voltage can destroy a *p*-*n* junction.

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

⇒ In TE and TM modes of rectangular waveguides having propagation in

*z*direction

E

_{z}and H

_{z}are both zero

In TE mode E

_{z}is zero and in TM mode H

_{z}is zero

In TE mode H

_{z}is zero and in TM mode E

_{z}is zero

In both TE and TM modes both E

_{z}and H

_{z}are non-zero

⇒ The total number of leads in MOS controlled thyristor is

2

3

4

2 or 3

⇒ To measure a resistance by a dc potentiometer

it is necessary to standardise the potentiometer

it is not necessary to standardise the potentiometer

it is necessary to use a volt ratio box

none of the above

⇒ The force in a magnetic field is given by F =

*qv*B

F and

*q*are perpendicular and

*v*and B are perpendicular

F and

*q*only are perpendicular to each other

F and

*v*, F and B are mutually perpendicular to each other and

*v*and B at any angle between them

All the four components are perpendicular to each other

⇒ The resolution of a wire wound potentiometer is about

0.00001

0.001

0.01

0.05

⇒ A current increasing at the rate of 1A/s is passed through a 1 H inductor. At

*t*= 0,

*i*= 0. The flux linkages after 1 sec are

0.5 Wb-turn

1 Wb-turn

2 Wb-turn

4 Wb-turn

⇒ The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE

_{10}mode is

equal to its group velocity

less than the velocity of light in free space

equal to the velocity of light in free space

greater than the velocity of light in free space

⇒ Dynamic range of hi-fi system is at least

150 dB

120 dB

80 dB

40 dB

⇒ A waveguide operated below cut off frequency can be used as

phase shifter

an attenuator

an isolator

none

⇒ Nichols chart consists of

constant magnitude loci

constant phase angle loci

magnitude and phase angle loci in log-magnitude versus phase diagram

none of the above

⇒ In the given figure shows a logic circuit. The minimum Boolean expression for this circui

A + B

A + B + C

AB + C

AB + AC + BC

⇒ In a klystron amplifier the input cavity is called

buncher

catcher

Pierce gun

collector

⇒ If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be

a straight line

a circle

an ellipse

a square

⇒ In a microstrip transmission the signal can be easily redirected by changing the centre strip.

TRUE

FALSE

⇒ The impedance 3.2 - j 12 in polar form is given as

6.4 ∠ - 75°

8.4 ∠ - 75°

10.4 ∠ - 75°

12.4 ∠ - 75°

⇒ The affect of ground on radiation pattern is to

cause cancellation of radiation along the ground

produce more number of nulls

both (a) and (b)

either (a) or (b)

⇒ In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. In receivers operating upto the limit of shortwave broadcasting the local oscillator often used is

Armstrong oscillator

Colpitts oscillator

Clapp oscillator

Ultra Audio oscillator

⇒ The rate of change of excess carrier density is proportional to carrier density.

TRUE

FALSE

⇒ For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as

2E

3E

4E

6E

⇒ Which of the following is not treated as hexadecimal constant by assembler in 8085?

64 H

5 AFH

AFH

OCFH

⇒ If sound intensity is 8 W/m

^{2}, the dB level of this sound is about

5 dB

50 dB

129 dB

1290 dB

⇒ Noise can be measured by

D.C. voltmeter

A.C. voltmeter

either of the above

none of the above

⇒ The maximum phase difference between the applied voltage and current in a RLC series current with finite values of R, L, C, and

*f*can be

less than 90°

less than 45°

180°

30°