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 materials having low retentivity are suitable for making |

A. | temporary smagnets [Correct Answer] |

B. | weak magnets [Wrong Answer] |

C. | permanent magnets [Wrong Answer] |

D. | both temporary and permanent magnets [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 :**

⇒ The mean life time of the minority carriers is in the range of a few

seconds

milli seconds

micro seconds

nano seconds

⇒ The voltage transfer functions of two port circuits connected in cascade can be easily found from

product of individual ABCD matrices

product of voltage transfer functions of two networks

sum of

*z*matrices

sum of

*h*matrices

⇒ Both X and Y plates of a CRO are excited by ac signals. The display is an ellipse which makes one rotation in 5 seconds. This means that

the frequency of one input is 5 times that of other

the difference between the frequencies of the two signals is one fifth of hertz

the difference between the frequencies of the two signals is 5 Hz

either (a) or (c)

⇒ The simplified logic expression for the circuit of the given figur

Y = A

Y = AB

Y = A + B

Y + A + B

⇒ In the given circuit, V

_{1}= 40 V when R is 10 Ω. When R is zero, the value of V

_{2}wil

40 V

30 V

20 V

10 V

⇒ A shadow zone does not receive any space wave

TRUE

FALSE

⇒ Half wave sysmmetry means

*f*(

*t*) = -

*f*(

*t*± T/2).

TRUE

FALSE

⇒ The Nyquist plot of a stable, transfer function

*G*(

*s*) is shown in the figure. We are interested in the stability of the closed loop system in the feedback configuration sh

G(

*s*) is an all-pass filter

G(

*s*) has a zero in the right-half plane

G(

*s*) is the impedance of a passive network

G(

*s*) is marginally stable

⇒ The troposphere extends from earth surface to a height of

15 km

90 km

150 km

200 km

⇒ Which of the following is true as regards photo emission?

Velocity of emitted electrons is dependent on light intensity

Rate of photo emission is inversely proportional to light intensity

Maximum velocity of electron increases with decreasing wave length

Both holes and electrons are produced

⇒ In a radar, the return echo arrives after the allocated pulse interval. Then

the receiver may be over loaded

the target will appear closer than its actual position

the return echo may interfere with transmitter operation

none of the above

⇒ Which power amplifier can deliver maximum load power?

Class A

Class AB

Class B

Class C

⇒ Consider the resonant circuit as shown b

R = 10

^{4}L = 5 μH C = 20 pF

1000 L = 50 μH C = 200 pF

10 K L = 50 μH C =20 pF

None of these

⇒ A voltage doubler circuit is fed by a voltage V

_{m}sin ω

*t*. The output voltage will be nearly 2 V

_{m}only if

load resistance is small

load resistance is large

load resistance is neither small nor large

either (a) or (c)

⇒ In a 4 bit weighted resistor D/A converter, the resistor value corresponding to LSB is 32 kΩ. The resistor value corresponding to MSB will be

32 KΩ

16 KΩ

8 KΩ

4 KΩ

⇒ The radix of a hexadecimal system is

2

3

8

16

⇒ A chopper is a high efficiency circuit.

TRUE

FALSE

⇒ In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port

10 mW

15 mW

20 mW

25 mW

⇒ The two modes of operation of three phase bridge inverters are known as

60° mode and 120° mode

90° mode and 120° mode

120° mode and 180° mode

120° mode and 240° mode

⇒

**Assertion (A):** The expression E = - ΔV, where E is the electric field and V is the potential is not valid for time varying fields.

**Reason (R):** The curl of a gradient is identically zero.

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

⇒ The units for apparent power are watts.

TRUE

FALSE

⇒ A combination circuit is one in which the output depends on

input combination at that time

input combination and previous output

input combination and previous input

present output and previous output

⇒ Which of these devices can conduct in both directions?

SCR

SUS

SBS

UJT

⇒ The attenuation in waveguides near the cut off frequency is

very low

very high

medium

zero

⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

20 days

18 days

16 days

15 days

⇒ The minimum energy of a photon required for intrinsic excitation is equal to

energy of bottom of conduction band

energy of top of valence band

forbidden gap energy

Fermi energy

⇒ F = ∑(0, 3, 4, 5, 7) =

[B ⊕ C] + AC

B'C' + BC + AC

AB + BC + CA

None

⇒ Initially the number decimal 8 is stored. If instruction

`RAL`

is executed twice, the final number stored will bedecimals 8

decimal 16

decimal 32

decimal 2

⇒ Radiation resistance of half-wave dipole (λ/2) antenna is in free space

73 Ω

120 p

36.5 Ω

70 Ω

⇒ A TRIAC can be turned on :

by applying a positive signal to gate

by applying a negative signal to gate

by applying either positive or negative signal to gate

none of the above