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Q1. | If a line having Z_{0} = 300 ∠ 0 W is short circuited at far end, VSWR is |

A. | 0 [Wrong Answer] |

B. | 1 [Wrong Answer] |

C. | ∞ [Correct Answer] |

D. | 2 [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ The important postulate arising out of Maxwell's modification of Ampere's law is

a changing magnetic field produces an electric field

a changing electric field produces a magnetic field

a motional e.m.f. is produced by a coil moving in a magnetic field

a steady current produce a magnetic field

⇒ The time needed by a TTL circuit to switch from 0 to 1 or 1 to 0 is about

10 μs

10 ns

100 μs

50 ns

⇒

**Assertion (A):** When an electron is revolving in its orbit and magnetic field is also present, the angular frequency of electron will be affected by the magnetic field.

**Reason (R):** In the case of electron revolving in its orbit in the presence of magnetic field, the orbital magnetic dipole moment is not affected by the presence of magnetic field.

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

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

A is true but R is false

A is false but R is true

⇒ A Karnaugh map with 4 variables has

2 cells

4 cells

8 cells

16 cells

⇒ If we need a low noise device, we should use

BJT

FET

thyristor

UJT

⇒ In which function is each term known as maxterm?

SOP

POS

Hybrid

SOP and Hybrid

⇒ A pulse stretcher is same as a

free running multivibrator

bistable multivibrator

monostable multivibrator

latch

⇒ In metals, the average drift velocity of electron per unit field is called mobility.

TRUE

FALSE

⇒ Which of the following radio waves are not reflected by ionosphere?

Waves above 1 kHz

Waves above 1 MHz

Waves above 10 MHz

Waves above 30 MHz

⇒ ADM stands for

Angle Delta Modulation

Angle Digital Modulation

Adaptive Delta Modulation

Adaptive Digital Modulation

⇒ The voltage

*e*

_{0}in the fi

48 V

24 V

36 V

28 V

⇒ In a self bias circuit for CE amplifier the collector supply voltage is made twice. The collector current will

decrease

increase

remain the same

increase or decrease

⇒ How many flag are there in 8085 microprocessor?

4

5

6

8

⇒ In an ideal current source, the source resistance is zero.

TRUE

FALSE

⇒ For an RC admittance function

the lowest critical frequency is a zero

the highest critical frequency is a pole

the lowest critical frequency is zero and the highest critical frequency is a pole

the lowest critical frequency is a pole

⇒ A source is delivering maximum power to a resistance through a network. The ratio of power delivered to the source power,

is always 0.5

may be 0.54 or less

may be 0.5 or less

may be 0.5 or more

⇒ In a tape recorder

the width of air gaps of record and erase heads is almost equal

the air gap of record head is wider than the air gap of erase head

the air gap of erase head is wider than the air gap of record head

any of the two air gaps can be wider than the other

⇒ A number is expressed in binary 2's complement as 10011 decimal equivalent value is

19

13

-19

-13

⇒ In a proportional plus integral control action

proportional gain K

*is adjustable but integral time T*

_{p}*is constant*

_{i}proportional gain K

*is adjustable but integral time T*

_{p}*is adjustable*

_{i}both proportional gain K

*and integral time T*

_{p}*are adjustable*

_{i}both proportional gain K

*and integral time T*

_{p}*are constant*

_{i}⇒ In

`ALU 1C 74181`

the addition and subtraction is in2's complement

1's complement

binary

none of the above

⇒ Which of these instruments is dynamometers type?

Wattmeter

Power factor meter

Frequency meter

Both (a) and (b)

⇒ In a second order undamped system, the poles are on

positive real axis

imaginary axis

negative real axis

either (a) or (c)

⇒ During transmission over a communication channel, bit errors occur independently with probability P. If a block of

*n*bits is transmitted, the probability of at most one bit error is equal to

1 - (1 - P)

^{n}

P + (

*n*- 1) (1 - P)

*n*P (1 - P)

^{n - 1}

(1 - P)

^{n}+

*n*P (1 - P)

^{n - 1}

⇒ The derivative of unit step function is

unit impulse

ramp with slope 1

impulse

either (a) or (b)

⇒ How much is contributed by each bit in the code word of a PCM system under uniform and symmetric quantization to the signal to noise ratio?

3 dB

4 dB

5 dB

6 dB

⇒ From the noise point of view, bandwidth should

be large

not be too large

should be as large as possible

should be infinite

⇒ Consider the following statements about root locus

- The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
- Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
- The number of root locus branches terminating on infinity is always zero

1, 2 and 3

1 and 2 only

1 only

2 and 3 only

⇒ For an antenna of height

*h*metres, the radio horizon is equal to

_{t}4

*h*metres

_{t}4

*h*km

_{t}2.5

*h*km

_{t}2.5

*h*metres

_{t}⇒ Consider the following statement : If a network has an impedance of (1 -

*j*) as a specific frequency, the circuit would consist of series

- R and C
- R and L
- R, L and C

1 and 2

1 and 3

1, 2 and 3

2 and 3

⇒ Let JCOKE = 20 and LPEPSI =15. Consider the statement

23

15

17