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 resistance of a standard conductor. |

A. | increases with frequency [Wrong Answer] |

B. | same for ac and dc [Wrong Answer] |

C. | increases with frequency [Wrong Answer] |

D. | increases as square root of frequency [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ An 8 bit transistor register has output voltage of low-high-low-high-low-high-low-high. The decimal number stored is

105

95

85

75

⇒ In a

*p*type material the Fermi level is 0.3 eV above valence band. The concentration of acceptor atoms is increased. The new position of Fermi level is likely to be

0.5 eV above valence band

0.28 eV above valence band

0.1 eV above valence band

below the valence band

⇒ If interrupt service request have been received from all of the following interrupts, then which one will be serviced last?

RST 5.5

RST 6.5

RST 7.5

None of these

⇒ In a radio detector

stabilization against signal strength variation is provided

linearity is worse than in a phase discriminator

the circuit is the same as in discriminator except that diodes are reversed

output is twice that obtainable from a similar phase discriminator

⇒ Which of the following is a valid real constant?

-81.56

73

10254,1

42

⇒ A capacitance transducer has two plates each of area 5 mm

^{2}. The coil gap is 2 mm. Displacement sensitivity due to change in gap length is

11.1 pF/cm

44.2 pF/cm

52.3 pF/cm

66.3 pF/cm

⇒ A broadcast radio transmitter radiates 5 kW when the modulation percentage is 60. How much of this is carrier power?

6.66 kW

5 kW

4.9 kW

4.23 kW

⇒ A TV picture is to be transmitted over a channel of 6 MH

*z*bandwidth at a 35 dB S/N ratio. The capacity of the channel is

50 M

*bps*

100 M

*bps*

36 M

*bps*

72 M

*bps*

⇒ The discrete time system describes by

*y*(

*n*) =

*x*(

*n*

^{2}) is

casual, Linear, time varying

casual, non-linear, timevari

non-casual, Linear, time invariant

non-casual, non-linear, time variant

⇒ The system with given pole-zero diagram is _______

Causal

Anti-causal

Both sided

Cannot be determined

⇒ A dynamometer wattmeter can be used for

dc only

ac only

dc and 50 Hz ac

dc and high frequency ac

⇒ The scale of dynamometer wattmeter is non linear.

TRUE

FALSE

⇒ The capacitance of a parallel plate capacitor varies as per the equation C(

*t*) = C

_{0}(1 - cos ω

*t*). It is connected to a battery of V volts. The equation for current is

ωC

_{0}V (1 - cos ω

*t*)

ωC

_{0}V(1 - sin ω

*t*)

ωC

_{0}V (1 - sin 2ω

*t*)

ωC

_{0}V sin ω

*t*

⇒ Ground wave can be used for communication upto

5 kHz

12 kHz

16 kHz

25 kHz

⇒ In a four element Yagi-Uda antenna

there is one driven element, one director and two reflectors

there is one driven element, two directors and one reflector

there are two driven elements, one director and two reflectors

all the 4 elements are driven element

⇒ The numbers of accelerating anodes in a CRO is

1

2

3

4

⇒ Transfer function of a linear system is 200

*e*

^{-j10ω}The system is a

distortionless Attenuator

amplifier with Phase distortion

distortionless Amplifier

attenuator with Phase distortion

⇒ Which of the following devices is used at the first stage of an electronic voltmeter?

BJT

SCR

MOSFET

UJT

⇒

**Assertion (A):** In AM, use of SSB reduces the power and bandwidth requirement

**Reason (R):** A balanced modulator produces AM with carrier suppressed

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 correct but R is wrong

A is wrong but R is correct

⇒ Consider the following instruments

- Tangent galvanometer
- Rayleigh current balance
- Household energy meter
- Hot wire ammeter

1, 2 and 3

1, 2 and 4

1 and 2

2, 3 and 4

⇒ Dielectric strength of polythene is around

10 kV/mm

40 kV/mm

100 kV/mm

140 kV/mm

⇒ If A = 4∠7°, A

^{2}is

16∠14°

16∠49°

16∠7°

16∠3.5

⇒ A typical value of insertion loss of SAW filter is

15 dB

2 dB

40 dB

60 dB

⇒ As the ratio R

_{f}/R

_{L}increases the efficiency of a rectifier increases.

TRUE

FALSE

⇒ In a piezoelectric crystal, application of a mechanical stress would produce

plastic deformation of the crystal

magnetic Dipoles in the crystal

electric polarization in the crystal

shift in the Fermi level

⇒ Double integration of unit step function leads to

an impulse

a parabola

a ramp

a doublet

⇒ In single phase half wave regulator, the average current over one full cycle

is always positive

may be positive or negative

may be negative

is always negative

⇒ Which of the following is correct for a driving point functions?

The real parts of all poles must be negative

The real parts of all poles and zeros must be negative

The real parts of all poles and zeros must be negative or zero

The real parts of all zeros must be negative

⇒ Which of the following statements is correct?

R-C is a dual pair

LC is a dual pair

Norton is a series circuit

Thevenin equivalent a parallel circuit

⇒ In a series resonant circuit, the resonant frequency is

geometric mean of half power frequencies

arithmetic mean of half power frequencies

difference of half power frequencies

none of the above