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Q1. | In a transistor with normal bias |

A. | the emitter junction has a low resistance [Correct Answer] |

B. | the emitter junction has a very high resistance [Wrong Answer] |

C. | the emitter junction supplies majority carries into the base region [Wrong Answer] |

D. | none of the above [Wrong Answer] |

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

⇒ Consider the following statements about a magic tee

- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.

1 and 2 are correct

1 and 3 are correct

1 and 4 are correct

2 and 3 are correct

⇒ Geosynchronous communication satellites travel around the earth in circular orbits with a forward speed of about __________ km/h.

11200

0

36000

22800

⇒ Square law modulators utilise

linear range of V-I characteristics of a diode

linear range of V-I characteristics of a triode

non-linear region of V-I dynamic characteristics of a diode

non-linear region of V-I dynamic characteristics of a triode

⇒

- P(
*s*) =*s*^{4}+*s*^{3}+ 2*s*^{2}+ 4*s*+ 3 - Q(
*s*) =*s*^{4}+ 2*s*^{3}+*s*

*s*) and Q(

*s*) polynomials?

Both P(

*s*) and Q(

*s*) are Hurwitz

Both P(

*s*) and Q(

*s*) are non-Hurwitz

P(

*s*) is Hurwitz but Q(

*s*) is non-Hurwitz

P(

*s*) is non-Hurwitz but Q(

*s*) is Hurwitz

⇒ 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

⇒ A capacitor used for power factor correction in single- phase circuit decreases

the power factor

the line current

both the line current and the power factor

the line current and increases power factor

⇒ If the variance σ

_{x}

^{2}of

*d*(

*n*) =

*x*(

*n*) -

*x*(

*n*- 1) is one-tenth the variance σ

_{x}

^{2}of a stationary zero mean discrete time signal

*x*(

*n*), then the normalized autocorrelation function R

_{xx}(

*x*)/σ

_{x}

^{2}at

*k*= 1 is

0.95

0.9

0.1

0.05

⇒

*n*-type semiconductors

are negatively charged

are produced when indium is added as impurity to germanium

are produced when phosphorus is added as impurity to silicon

none of the above

⇒ An ac circuit has an impedance of (3 +

*j*6) ohm for fundamental. The impedance for fifth harmonic is

(15 +

*j*30) Ω

(15 +

*j*6) Ω

(3 +

*j*30) Ω

(3 +

*j*1.2) Ω

⇒ The length of character constant P . b b . E . b C . is

9

6

10

7

⇒ Bitter powder patterns prove the existence of domains.

TRUE

FALSE

⇒ In push button type telephone set, pressing a button generates

one frequency

two high frequencies

two low frequencies

one low frequency and one high frequency

⇒ The inductance of a coil can be increased by

choosing core material having high relative permeability

decreasing diameter of the former

decreasing the number of turns

increasing core length

⇒ For attenuation of high frequencies we should use

shunt capacitance

series capacitance

inductance

resistance

⇒ Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then

phase modulation index as well as frequency modulation index decrease

phase modulation index as well as frequency modulation index increase

phase modulation index will remain constant whereas frequency modulation index will increase

phase modulation index will decrease whereas frequency modulation index will remain constant

⇒ In an SCR, the anode current consists of

only holes

only electrons

both electrons and holes

either electrons or holes

⇒ The temperature at which some materials become superconductors is called

Transition temperature

Curie temperature

Neel temperature

Onnes temperature

⇒ DeMorgan's second theorem is

A . A = 0

A = A

A + B = A . B

AB = A + B

⇒ A discrete LTI system is non-casual if its impulse response is

*a*

*∪(*

^{n}*n*- 2)

*a*

*∪(*

^{n-2}*n*)

*a*

*∪(*

^{n+2}*n*)

*a*

*∪(*

^{n}*n*+ 2)

⇒ Which is correct for a transfer function?

The poles and zero must be complex

If the poles and zeros are complex or imaginary, they must be conjugate

If the poles and zeros are complex they must be simple

If a zero is imaginary, it must be simple

⇒ The first and the last critical frequencies (singularities) of a driving point impedance function of a passive network having two kind of elements, are a pole and a zero respectively. The above property will be satisfied by

RL network only

RC network only

LC network only

RC as well as RL network

⇒ The satellites used for intercontinental communication are called

Comsat

Domsat

Marisat

Intelsat

⇒ For a second order system delay time

*t*is the time required to reach

_{d}half the final value for the very first time

the final value for the very first time

90% of the final value for the very first time

none of the above

⇒ δ(

*t*) is a

energy signal

power signal

neither energy nor power

none

⇒ A single layer air cored coil has

*n*turns and inductance L. If a new coil is formed by having 2

*n*turns while keeping the coil length and diameter the same, the new inductance is

0.5 L

L

2 L

4 L

⇒ Which of the following does not apply to Yagi-Uda antenna

High gain

Reasonably good bandwidth

Folded dipole

Parasitic elements

⇒ Data from a satellite is received in serial form (1 bit after another). If this data is coming at a 5 MHz rate and if the clock frequency is 5 MHz how long will it take to serially load a word in a 32-bit shift register?

1.6ms

3.2ms

6.4ms

12.8ms

⇒ State variables which describe a system are a unique set.

TRUE

FALSE

⇒ The O/P Power of a power amplifier is several times its input power. It is possible because

power amplifier introduces a -ve resistance

there is +ve feed back in the circuit

step up transformer is use in the circuit

power amplifier converts a part of I/P d.c. power into a.c. power

⇒ In given figure the switch was closed for a long time before opening at

*t*= 0. The voltage V

_{x}at

*t*= 0

^{+25 V50 V-50 V0 V}