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. | The r.m.s. value of a half-wave rectified current is 100 A. Its value for full-wave rectification would be __________ amperes. |

A. | 141.4 [Correct Answer] |

B. | 200 [Wrong Answer] |

C. | 200/p [Wrong Answer] |

D. | 40/p [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ X and Y are two random variables and Z = X + Y . Letmz, m

*, m*

_{z}*, m*

_{x}*represent mean of Z, X and Y. Then*

_{y}*m*=

_{z}*m*+

_{x}*m*

_{y}*m*≤

_{z}*m*+

_{x}*m*

_{y}*m*<

_{z}*m*+

_{x}*m*

_{y}*m*>

_{z}*m*+

_{x}*m*

_{y}⇒ 2's complement number 00011111 = __________

_{10}

31

-31

11

-11

⇒ A parallel RLC circuit has ω

_{0}= 10

^{6}and Q = 30, Given C = 30 pF, the value of R is

0

1 μΩ

2 MΩ

1 MΩ

⇒ A system is stable if ROC

include the unit circle

exclude the unit circle

lies on Circle

entire plane

⇒ A 2 bit binary multiplier can be implemented using

2 inputs ANDs only

2 I/P XOR and 4 I/P AND gate only

two 2 inputs NORs and One XNOR gate

XOR gates and shift registers

⇒ A linear system is characterized by H(ω) = B

*e*

^{-2ω2}the system is physically

unrealizable

realizable

depends upon B

depends upon constant 2

⇒ IC 74181 performs arithmetic operations when M = 1.

TRUE

FALSE

⇒ In the amplifier circuit figure the quiescent point voltage and current

12 V, 5 mA

12 V, 2 mA

10 V, 2 mA

10 V, 5 mA

⇒ Trap circuits used in video IF amplifier of colour TV are

High Q, LC resonant circuit

Low Q, LC resonant circuit

High Q, RLC resonant circuit

Low Q, RLC resonant circuit

⇒ 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)

⇒ The strength of controlled voltage source depends on

value of current elsewhere in the circuit

value of voltage elsewhere in the circuit

value of current or voltage elsewhere in the circuit

none of the above

⇒ Under ordinary circumstances, impulse noise can be reduced in

FM only

AM only

both AM and FM

none of the above

⇒ A conditionally stable system has

one phase crossover frequency

two phase crossover frequencies

two or more phase crossover frequencies

one or more phase crossover frequencies

⇒ The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X results in a binary number without overflow. This implies that the result is

-ve and is in normal form

-ve and 2's complement form

+ve and is in normal form

+ve and in 2's complement

⇒ Given figure shows a 90° sector of spherical reflector with vertex 'V', centre of curvature 'C' and equal distances VD, DF, FE and EC. When a beam of EM wave is incident parallel to the axis, all the energy will pass through the reg

VD

DF

EF

EC

⇒ For a full wave bridge rectifier supplied with 50 Hz a.c., the lowest ripple frequency will be

50 Hz

100 Hz

200 Hz

400 Hz

⇒ A rectifier voltmeter using bridge rectifier and PMMC meter is calibrated to read rms value of sine wave. A triangular wave is applied to it and it reads 6.82 V. The rms value of triangular wave is

about 6.82 V

about 7.1 V

about 6.5 V

about 10 V

⇒ An active network has

an e.m.f source

a current source

neither of the above

either (a) or (b)

⇒ The frequency of the driving network connected between pins 1 and 2 of a 8085 chip must be

equal to the desired clock frequency

twice the desired clock frequency

four times the desired clock frequency

eight times the desired clock frequency

⇒ The Fourier series of a real periodic function has only

- Cosine terms if it is even
- Sine terms if it is even
- Cosine terms if it is odd
- Sine terms if it is odd

(1) and (4)

(1) and (2)

(2) and (4)

(2) and (3)

⇒ A square current wave of magnitude 1 A is applied to an element for 5 seconds. The voltage across the element rises linearly from 0 to final value linearly. The element is

resistance

inductance

capacitance

R and C in series

⇒ An RLC series circuit has R = 7.07 Ω, L = .707 H and C = 7.07 μF. At Half power frequencies the circuit impedance is likely to be

7.07 Ω

10 Ω

14.14 Ω

20 Ω

⇒ Linear diode detector utilizes

linear portion of static characteristics of diode

linear portion of dynamic characteristic of diode

square law portion of dynamic characteristics of diode

rectification property of diode

⇒ In FDM systems used for telephone, which modulation scheme is adopted?

AM

DSB-SC

SSB-SC

FM

⇒ How many flag are there in 8085 microprocessor?

4

5

6

8

⇒ Resistivity of rubber is about

10

^{2}Ω-m

10

^{-2}Ω-m

5 x 10

^{8}Ω m

5 x 10

^{12}Ω-m

⇒ The noise at the input to an ideal frequency detector is white. The detector is operating above threshold. The power spectral density of the noise at the output is

raised-cosine

flat

parabolic

Gaussian

⇒ For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.

TRUE

FALSE

⇒

`ALU 1C 74181`

can accept two words each having2 bits

4 bits

8 bits

16 bits

⇒ The multiplication of two

*n*bit numbers gives a product of length less than or equal to

*n*bits

2

^{n}bits

2

*n*bits

2

^{n}- 1 bits