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 a rectifier circuit the filter capacitance is increased. Then the ripple will |

A. | increase [Wrong Answer] |

B. | decrease [Correct Answer] |

C. | remain the same [Wrong Answer] |

D. | either (a) or (b) [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 :**

⇒ A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

dc output voltage and rms output voltage decrease in the same proportion

dc output voltage and rms output voltage decrease

dc output voltage and rms output voltage increase

dc output voltage and rms output voltage increase in the same proportion

⇒ The effect of earth's magnetic field on radiowaves is minimum when

the electric field lines of radio waves and flux line of earth's magnetic field are in the same direction

the electric field lines of radio waves and flux lines of earth's magnetic field are at right angles

the electric field lines of radiowaves and flux lines of earth's magnetic field oppose each other

both (b) and (c)

⇒ Inputs A and B of the given figure are applied to a NAND gate. The output is

from 0 to 6

from 0 to 2

from 0 to 1 and 2 to 3

from 1 to 2 and 3 to 4

⇒ AECF1

_{16}+ 15ACD

_{16}= __________ .

C47BB

_{16}

C47BE

_{16}

A234F

_{16}

A1111

_{16}

⇒ For the K map of the given figure the simplified Boolean expressio

ACD + ABD + BCD

ACD + BCD

ACD + ABD

none of the above

⇒ Which of the following equations satisfy Maxwell's equations?

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

E

_{x}= E

_{y}= 0, E

_{z}= cos (

*y*-

*ct*)

F

_{y}= cos (

*y*-

*ct*), E

_{x}= E

_{z}= 0

None of these

⇒ 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

⇒ If

*f*(

*t*) is in volts, then F(

*j*ω) is in

volts

volt seconds

volts/sec

volt-sec

^{2}

⇒ Which of the following material is preferred for transformer cores operating in micro wave frequency range?

Ferrites

Silicon steel

Superalloy

Copper

⇒ Which of the following microphones has lowest output impedance?

Moving coil

Ribbon

Crystal

Condenser

⇒ The temperature coefficient of a thermistor

is positive

is negative

zero

may be positive or negative depending on its composition

⇒ 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

⇒ Read the following statements as regards register pairs in microprocessor 8085

- B represents B, C pair with B as high order register and C as low order register.
- D represents D, E pair with D as high order register and E as low order register.
- H represents H, L pair with H as high order register and L as low order register.

All

1 and 3

1 and 2

2 and 3 only

⇒ The radix of a hexadecimal system is

2

3

8

16

⇒ A first order element yields almost exact duplication only for constant or slowly varying phenomenon.

TRUE

FALSE

⇒ Tuned amplifiers are used at radio frequencies.

TRUE

FALSE

⇒ Which of the following is used in the sterilization of water?

Hydrogen bromide

Oxygen

Ozone

Caustic potash

⇒ What are the ultimate purpose of minimizing logic expressions?

- To get small size expression.
- To reduce the number of variables in the given expression.
- To implement the function of the logic expression with least hardware.
- To reduce the expression for making it feasible for hardware implementation.

1 only

2 and 3

3 only

3 and 4

⇒ If

*f*is more than

*f*

_{unity}the gain of op-amp becomes less than 1.

TRUE

FALSE

⇒ A (75 -

*j*40) W load is connected to a co-axial line of

*z*

_{0}= 75ω at 6 MHz. The load matching on the line can be accomplished by connecting

a short circuit stub at the load

an inductance at the load

a short circuit stub at a specific distance from the load

a capacitance at a specific distance from the load

⇒ From an

*n*channel JFET for V

_{DS}constant and if V

_{GS}is made more negative, pinch off would occur at

higher value of drain current

saturation value of drain current

zero drain current

gate current equal to drain current

⇒ Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz

30, 60 and 70 kHz

3, 6 and 7 kHz

30, 60 and 70 MHz

3, 6 and 7 GHz

⇒ A reactance function

has a pole at origin

has a zero at origin

may have a pole or zero at origin

has a pole or zero at origin and a pole or zero at infinity

⇒ For measuring mutual inductance we can use

Anderson bridge

Maxwell's bridge

Heaviside bridge

Either (a) or (b)

⇒ Calculate the stability factor and change in I

_{c}from 25°C to 100°C for, β = 50, R

_{B}/R

_{E}= 250, ΔI

_{CO}= 19.9

*n*A for emitter bias configuration

42.553, 0.85 μF

40.91, 0.58 μF

38.53, 0.85 μF

41.10, 0.39 μF

⇒ The circuit I in figur

1 mA

4 mA

8 mA

10 mA

⇒ The thermionic emission current is given by

Fermi-Dirac distribution

Maxwell's equation

Richardson Dushman equation

Langmuir Child law

⇒ 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

⇒ In a semi converter feeding a resistive load, the firing angle is a. Each thyristor conducts for

p radians

(p - a) radians

(p + a) radians

(p - 0.5 a) radians

⇒ 10 in BCD code represent

10100

1100

10111

None of the above