Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to |

A. | decrease in the value of reactance [Wrong Answer] |

B. | an increase in the value of reactance [Correct Answer] |

C. | no change in the reactance value [Wrong Answer] |

D. | no change in the impedance value [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 :**

⇒ Which of the following are true for magic tee in the given figure select the answer as per given c

1, 2 and 3

1, 2 and 4

2, 3 and 4

1, 3 and 4

⇒ In Z

_{RC}(

*s*) has a pole at

*s*= 0, the first element in second Foster realization is

R

C

R and C in series

R and C in parallel

⇒ The simplest method of suppression of unwanted side band in AM is

filter method

phase shift method

third method

both (a) and (b)

⇒ Of the four INSAT-I satellites planned by India so for, only __________ has proved to be successful.

INSAT-IA

INSAT-IB

INSAT-IC

INSAT-ID

⇒ When a voltage is applied to a semiconductor crystal then the free electrons will flow.

towards positive terminal

towards negative terminal

either towards positive terminal or negative terminal

towards positive terminal for 1 μs and towards negative terminal for next 1 μs

⇒ The colour on the extreme left in general purpose fixed resistors represents

first significant digit

tolerance

wattage rating

voltage rating

⇒ The total number of fundamental products of three variables is

3

5

8

16

⇒ In Bode analysis the correction at corner frequency is 3 dB.

TRUE

FALSE

⇒ 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°

⇒ Push pull amplifier is

voltage amplifier

current amplifier

power amplifier

none of the above

⇒ Which of the following device acts as an N-P-N and a P-N-P transistor connected base to base and emitter to controller?

UJT

SCR

Diac

Triac

⇒ An FM signal with a deviation is passes through the mixer, and has its frequency reduced five fold. The deviation in the output of the mixer is

Δ

5Δ

Δ/5

indeterminant

⇒ X(

*t*) is a stationary process with the power spectral density S

_{x}(

*f*) > 0 for all

*f*. The process is passed through a system shown be

S

_{y}(

*f*) > 0 for all

*f*

S

_{y}(

*f*) = 0 for |f| > 1kHz

S

_{y}(

*f*) = 0 for

*f*=

*nf*

_{0},

*f*

_{0}= 2kHz,

*n*any integer

S

_{y}(

*f*) = 0 for

*f*= (2

*n*+ 1)

*f*

_{0}= 1 kHz,

*n*any integer

⇒ If E is energy level of electron and E

_{F}is Fermi level, then

all quantum states with E less than E

_{F}will be occupied at T = 0

all quantum states with E less than E

_{F}will be empty at T = 0

some quantum states with E less than E

_{F}will be occupied at T = 0

none of the above

⇒ In position control system the device used for providing rate feedback voltage is

potentiometer

synchro-transmitter

synchro-transformer

tacho generator

⇒ In commercial electron tubes the current produced by the cathode at 1000 K is about

0.01 A per cm

^{2}of cathode surface

0.1 A per cm

^{2}of cathode surface

1 A per cm

^{2}of cathode surface

5 A per cm

^{2}of cathode surface

⇒ Following figure repres

AND

OR

NAND

NOT

⇒ The load circuit of a single phase full bridge inverter

must be underdamped

must be overdamped

may be underdamped or overdamped

may be any type of load

⇒ In figure the zener has a resistance of 5 ohms. As the load resistance is varied, the output vol

will remain constant at 12 V

will vary between 12.05 and 12.65 V

will vary from 10 to 20 V

will remain constant at 12.05 V

⇒ Magnetic flux can be measured by

capacitive pick up

inductive pick up

resistive pick up

hall effect pick up

⇒ An unmodulated voltage 10

*V*effective is applied to a dioxide detector in which load resistance is 4 x 10

^{-5}ohms. A micrometer shows that the rectified DC current in this resistance is 30

*A*. The input resistance of the detector is

114 kW

336 kW

384 kW

455 kW

⇒ The log magnitude curve for a constant gain K is a horizontal straight line at a magnitude 20 log K dB.

TRUE

FALSE

⇒ As the area of a public meeting increases the amplifier power output required increases.

TRUE

FALSE

⇒ The operating voltage of a megger is about

100 V

12 V

6 V

1 V

⇒ For a Gaussian process, auto-correlation also implies

statistical dependence

statistical independence

ergodic process

none of the above

⇒ Which of the following logic no resistors are used?

CMOS

TTL

4 n sec ECL

8 sec ECL

⇒ An R-C coupled amplifier has mid-frequency gain of 200 and a frequency response from 100 Hz to 20 kHz. A negative feedback network with β = 0.2 is incorporated into the amplifier circuit, the Bandwidth will be

50 kHz

20 kHz

100 kHz

infinite

⇒ The resonant frequency of an R

_{F}amplifier is 1 MHz and its bandwidth is 10 kHz. The Q factor will be

10

100

0.01

0.1

⇒ If

*a*and

*b*are the dimensions of waveguide then

*a*= 3

*b*

*a*= 2

*b*

*a*=

*b*

*a*=

*b*/4

⇒ Which of the following devices exhibit negative resistance characteristics?

UJT

PUT

Both UJT and PUT

UJT, PUT and SBS