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Q1. | Surface impedance at high frequencies is a consideration for |

A. | ferrites [Wrong Answer] |

B. | semiconductors [Wrong Answer] |

C. | good conductors [Correct Answer] |

D. | dielectrics [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ Pick the Odd one out

MOSFET

FET

Planer transistor

Unijunction transistor

⇒ In an

*n*-

*p*-

*n*transistor biased for operation in forward active region

emitter is positive with respect to base

collector is positive with respect to base

base is positive with respect to emitter and collector is positive with respect to base

none of the above

⇒ A rectangular pulse is passed through an L.P.F. The response is a

triangular

trapezoidal function

sampling

Both (a) and (b)

⇒ Consider the following features:

- negative operands cannot be used
- when immediate operand changes, the program should be reassembled
- the program is difficult to read
- the size of operand is restricted by word length of the computer

1 and 2

2 and 4

2 and 3

1 and 4

⇒ MCVF telegraphy causes

SSB techniques

pulse modulation

Out of bond signalling

FM

⇒ Which of the following can be used as a buffer amplifier?

CE

CC

CB

Both (a) and (c)

⇒ Decade counter has 4 flip flops and skips states 10 to 15.

TRUE

FALSE

⇒ In a thyristor the gate current is increased, then

anode current will increase

anode current will decrease

anode current will remain constant

anode current may increase or decrease

⇒ The correct hierarchy of operations for the operators & &, = = , = , * is

& & , = = , = , *

* , = = , & & , =

* , & & , = = , =

= , & & , = = , *

⇒ 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

⇒ A half wave diode rectifier uses a diode having forward resistance of 50 ohms. The load resistance is also 50 ohms. Then the voltage regulation is

0.2

0.5

1

2

⇒

**Assertion (A):** JFET is a voltage controlled device.

**Reason (R):** The drain current can be controlled by controlling V_{GS}.

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

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

A is true but R is false

A is false but R is true

⇒ As temperature increases, the temperature coefficient of a metal

decreases

increases

remains unchanged

any of the above

⇒ In gases the flow of current is due to

positive ions only

electrons only

electrons, positive ions and negative ions

electrons and positive ions

⇒ Which of the following is not an application software?

MS Word

DBMS

Worksheet

Lisp

⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform

all three are used in continuous time domain

all three are used in both continuous time domain and discrete time domain

Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain

Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain

⇒ Consider the following statements about 8085

- The instruction
`LDA`

uses direct addressing mode. - The instruction
`MVI`

uses direct addressing mode. - The instruction
`MVI`

uses immediate addressing mode. - The instruction
`LDA`

uses immediate addressing mode.

1 and 3 only

3 and 4 only

1 and 2 only

2 only

⇒ Maximum effective aperture (A

_{e})max of short dipole antenna is

1.119 λ

^{2}

0.119 λ

^{2}

1.19 λ

^{2}

1.919 λ

^{2}

⇒ In a synchro transmitter

input is angular position of rotor shaft and output is stator voltages

input is stator voltages and output is angular position of shaft input is rotor voltage and output is angular position of rotor shaft

input is rotor voltage and output is angular position of rotor shaft

input is angular position of rotor shaft and output is rotor voltage

⇒ Consider the following Statements regarding resistance strain gauge

- The gauge factor is in the range of 2 to 5.
- The resistance changes due to change in specific resistance with strain.
- The resistance increases with increase in temperature.

1, 2, 3

1 and 2

2 and 3

1 and 3

⇒ For an P-channel enhancement type MOSFET determine the drain current if K = 0.278 x 10

^{-3}A/V

^{2}, V

_{GS}= -4V, V

_{T}= -2V, Voltage equivalent at 27°C = 26 mV.

10 mA

1.11 mA

0.751 mA

46.98 mA

⇒

*V*

_{L}= 100 cos (10

*t*+ 30&d

116.57 sin (10

*t*- 29°) V

116.57 sin (10

*t*+ 29°) V

117.00 sin (10

*t*- 29°) V

117.00 sin (10

*t*+ 29°) V

⇒ A band elimination constant

*k*filter has series resonant circuit in series arms.

TRUE

FALSE

⇒ The triangular wave of the given figure can be written as

*v*(

*t*) =

*u*(

*t*) -

*tu*(

*t*) + (

*t*- 1)

*u*(

*t*

TRUE

FALSE

⇒ 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

⇒ A plane electromagnetic wave travels in dielectric medium of relative permittivity 9. Relative to free space, the velocity of propagation in the dielectric is

increased by a factor of 9

increased by a factor of 3

unchanged

reduced by a factor of 1/3

⇒ The number of days when Earth's shadow falls on a geosynchronous satellite is

88

277

5

10

⇒ The number of inputs and outputs in a full adder are

2 and 1

2 and 2

3 and 3

3 and 2

⇒ In a three variable K map four adjacent cells give

single variable term

two variable term

three variable term

either (a) or (b)

⇒ For the block diagram of the given figure, the equation describing system dynamic

(1 + RC

*s*) Δθ

_{0}(

*s*) = Δθ

_{i}(

*s*) + R Δ H(

*s*)

(1 + RC

*s*) [ΔH(

*s*)] = Δθ(

*s*) - Δθ

_{0}(

*s*)

(1 + RC

*s*) Δθ

_{0}(

*s*) = RΔ H(

*s*) - Δ θ

*(*

_{i}*s*)

(1 + RC

*s*) Δθ

*(*

_{i}*s*) = Δ H(

*s*)[R] - Δθ

_{0}(

*s*)