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Q1. | When there is rapid attenuation of field inside the conductor, the field current are concentrated close to the surface of the conductor; this phenomenon is called |

A. | skin effect [Correct Answer] |

B. | EM concentration effect [Wrong Answer] |

C. | Faraday's effect [Wrong Answer] |

D. | Ohm's effect [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ 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 planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is

2

3

4

6

⇒ Solution of Laplace equations, which are continuous through the second derivative, are called

bessel functions

odd functions

harmonic functions

fundamental functions

⇒ Which of the following expressions is true for apparent power in an A.C. circuit?

VI cos Φ

V

_{av}x I

_{av}

V

_{r.m.s}x I

_{r.m.s}

V

_{peak}x I

_{peak}

⇒ A series R-L circuit has R = 1 Ω and L = 1 H. It is excited by a V battery at

*t*= 0. The steady state condition is reached at

*t*= 1

*s*

*t*= 0.1

*s*

*t*= 0

*s*

*t*= ∞

⇒ The total area under the probability distribution curve is

1

0

depend upon curve equation

∞

⇒ For the BJT shown in figure, β = 50, the value of V

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3.13 V

4.24 V

5.18 V

none

⇒ Which of the following statement about the advantage of phase discriminator over the slope detector is false?

Fewer tuned circuits

Better linearity

Greater limiting

Much easier alignment

⇒ Which one of the following effects is used in measuring power?

Seeback

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Induction

Hall

⇒ The number of roots of

*s*

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*s*

^{2}+ 7

*s*+ 3 = 0 in the left half of the s-plane is :

zero

one

two

three

⇒ The number of address lines in EPROM 4096 x 8 is

2

4

8

12

⇒ The property is not valid for basic singularity function is

it is even signal

convolution of any arbitary function

*x*(

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the sum of two impulses at same location is the impulse with the strength equal to the summation of individual strengths.

none of these.

⇒ A voltage wave is

*i*= 100 sin (ω

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zero

70.72 V

63.70 V

none of the above

⇒ A MOD - 2 counter, the FF has a

*t*= 60 nsec. The NOR gate has a

_{pd}*t*of 30 nsec. The clock frequency is

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40 MHz

111 MHz

none

⇒

**Assertion (A):** Microprocessor 8085 has an 8 bit register called accumulator which stores intermediate answers during a computer operation.

**Reason (R):** Accumulator can send or receive data.

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 R is wrong

A is wrong R is correct

⇒ For NOR gate SR flip-flop, the 'no change' condition is

S = 0, R = 0

S = 1, R = 0

S = 0, R = 1

S = 1, R = 1

⇒ The D.C. alpha(a) of a transistor is approximately

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10 to 50

100 to 500

1000 to 5000

⇒ In a magnetron the magnetic flux density is of the order of

1

*mWb*/

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1

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10

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*m*/

*s*

10

^{12}

*m*/

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⇒ Which of the following can provide two or more voice circuits with the same carrier?

SSB

Carrier reinsertion

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Independent side band system

⇒ System satellites orbit the Earth once in

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12 hours

1 hours

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⇒ A transmitter power of 5 W is increased by 20 dB. The effective radiated power is

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100 W

25 W

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⇒ In a CE bipolar transistor operating in active region, collector current is independent of

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none of the above

⇒ Consider the following statements

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- Fading of signals is generally greatest in shadow zone.
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1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

⇒ In auxiliary commutated chopper, the charging and discharging time of capacitor

are constant

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may be constant or may depend on load current

none of the above

⇒ In an

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lowest when p.f. is lagging

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⇒ Consider the following statements regarding electromagnetic flowmeter

- AC excitation is used to avoid polarisation of fluid.
- The meter calibration is changed as viscosity of fluid changes.
- Stainless steel pipes can be used for measuring the flow of liquid of high conductivity.

1, 2, 3 are correct

1 and 2 are correct

2 and 3 are correct

1 and 3 are correct

⇒ The power to the portable unit of a cordless telephone is provided by

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dry cells

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⇒ A function will have only sine terms if

*f*(

*t*) = -

*f*(

*t*)

*f*(-

*t*) =

*f*(

*t*)

*f*(-

*t*) = -

*f*(

*t*)

none of the above

⇒ For the discrete time system of the given fig

*y*= 0.5

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_{k}*y*= 0.5

_{k}*u*

_{k}_{ - 1}-

*u*- 0.25

_{k}*y*- 1

_{k}*y*= 0.5

_{k}*u*

_{k}- u_{k}_{ - 1}- 0.25

*y*- 1

_{k}*y*= 0.5

_{k}*u*

_{k}_{ - 1}-

*u*

_{k}_{ - 1}- 0.25

*y*- 1

_{k}⇒ Two resistances R

_{1}= 18.7 Ω. and R

_{2}= 3.624 Ω in series. The total resistance to the appropriate number of significant figures is

22.324 Ω

22.32 Ω

22.3 Ω

22 Ω