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Q1. | Power handling capacity of wire wound potentiometer used in control systems is about |

A. | 0.1 W [Wrong Answer] |

B. | 5 W [Correct Answer] |

C. | 25 W [Wrong Answer] |

D. | 100 W [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ 100101.1011

_{2}= __________ .

115.22

_{8}

115.54

_{8}

215.54

_{8}

100.01

_{8}

⇒ Which multivibrator can be used as a clock timer?

Astable multivibrator

Bistable multivibrator

Any of the above

None of the above

⇒ Unit of e is __________ .

coulomb/newton-metre

coulomb

^{2}/newton-metre

Farad/metre

Farad

^{2}/metre

⇒ The poles of an RC function

are simple and lie on

*j*ω axis

are simple and lie on negative real axis

may be complex conjugate

may be anywhere in

*s*plane

⇒ δ(

*t*-

*b*) is a pulse function.

TRUE

FALSE

⇒ An RL impedance function is to be synthesised in second Foster form. The proper function to be expanded is

Z(

*s*)

*s*Z(

*s*)

1/Z(

*s*)

Z(

*s*)/

*s*

⇒ The numerical value of directivity of current element of half-wave dipole is 1.76 and 2.15 dB respectively. The directive gain of half-wave dipole over current element will be

3.91 dB

1.95 dB

0.39 dB

0.195 dB

⇒ The circumference of an electron orbit is equal to integer times the wavelength of electron.

TRUE

FALSE

⇒ The response shown in figur

over damped

critically damped

under damped

either (a) or (c)

⇒ The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm

^{2}/sec. The diffusion length is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ For a P-N junction diode, the current in reverse bias may be

few amperes

between 0.5 A and 1 A

few milliamperes

few micro or nanoamperes

⇒ Fourier transform F(

*j*ω) of an arbitrary signal has the property

F(

*j*ω) = F(-

*j*ω)

F(

*j*ω) = - F(-

*j*ω)

F(

*j*ω) = F*(-

*j*ω)

F(

*j*ω) = - F*(

*j*ω)

⇒ A quarter wave line open circuited at far end behaves as

inductance

L and C in parallel

capacitance

L and C in series

⇒ The emission of light is LED due to

emission of holes

emission of electrons

generation of electromagnetic radiations

conversion of heat energy into illumination

⇒ In a three variable K map four adjacent cells give

single variable term

two variable term

three variable term

either (a) or (b)

⇒

**Assertion (A):** Impulse function is an important function in network analysis.

**Reason (R):** Convolution integral enables us to find the response of a network to an arbitary input in terms of the impulse response.

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

⇒ A shadow zone does not receive any space wave

TRUE

FALSE

⇒ In AM receiver the oscillator frequency is

always equal to signal frequency

always equal to 455 kHz

always higher than signal frequency

always lower than signal frequency

⇒ A λ/4 long high frequency transmission line is terminated into one impedance Z

_{R}. If Z

_{0}be the characteristic impedance of the line, then input impedance Z

_{in}is

Z

_{o}Z

_{R}

Z

^{2}

_{R}/Z

_{o}

Z

^{2}

_{0}/Z

_{R}

Infinity

⇒ Consider the following BJT circ

2.46 kΩ

2.88 kΩ

200 Ω

18.48 Ω

⇒ Z transform is a non-linear operation.

TRUE

FALSE

⇒ A point charge of 6 μC is located at the origin, uniform line charge density of 180

*n*C/

*m*of 8

*m*length lies along the

*x*axis and a uniform sheet of charge equal to 25

*n*C/

*m*

^{2}of area p x 4

^{2}lies in the

*z*= 0 plane. Calculate total electric flux leaving the surface of sphere of 4

*m*radius centered at origin.

86.97 μC

8.697

*n*C

8.697 μC

86.97

*n*C

⇒

Match the following:

List I (Location of characteristics roots) | List II (System characteristic) | ||
---|---|---|---|

A. | (- 1 + j), (- 1 - j) | 1. | Marginally stable |

B. | (- 2 + j), (- 2 - j), (2, j) (- 2, j) | 2. | Unstable |

C. | - j, j - 1, 1 | 3. | Stable |

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-1, C-2

A-1, B-3, C-2

⇒ Which of the following noise does not occur in transistors?

Partition noise

Shot noise

Flicker noise

Resistance noise

⇒ Which solid dielectric has highest temperature limit?

E

H

C

F

⇒ Fill in the suitable word in the blanks is the following questions. The electron in the outermost orbit is called __________ electron.

valence

covalent

acceptor

donor

⇒ For the system in the given figure, the characteristic equation

*s*

^{2}+

*s*(3 + 6

*a*) + 6 = 0

*s*

^{2}+

*s*(3 + 12

*a*) + 12 = 0

*s*

^{2}+ 3

*s*= 0

*s*

^{2}+ 6

*s*= 0

⇒ 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)

⇒ As frequency increases, the transmission efficiency

decreases

increases

is not affected

either (a) or (c)

⇒ As the viscosity of a liquid increases, the relaxation time

remains constant

increases

decreases

first decreases then increases