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. | Antenna beamwidth is |

A. | measure of directivity [Correct Answer] |

B. | measure of angle [Wrong Answer] |

C. | measure of radiation pattern [Wrong Answer] |

D. | measure of power pattern [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 :**

⇒ A step voltage E is applied to an R-L series circuit. At

*t*= 0, the current in the circuit is

E/R

E/L

infinity

zero

⇒ A silicon PN junction with no bias have a doping concentration

3.345 x 10

^{-3}cm

3.345 x 10

^{-4}cm

3.345 x 10

^{-5}cm

3.345 x 10

^{-6}cm

⇒ In 8085, which of the following registers cannot be paired?

A

E

C

both (b) and (c)

⇒ The scale of thermocouple instrument is linear.

TRUE

FALSE

⇒ The current through a resistance

*R*is shown in figure. The computed value of power

400 ± 0.42 W

400 ± 4.6 W

400 ± 8.85 W

400 ± 10.65 W

⇒ What are the ultimate purpose of minimizing logic expressions?

- To get small size expression.
- To reduce the number of variables in the given expression.
- To implement the function of the logic expression with least hardware.
- To reduce the expression for making it feasible for hardware implementation.

1 only

2 and 3

3 only

3 and 4

⇒ The baud rate is

always equal to the bit transfer rate

equal to twice the bandwidth of an ideal channel

not equal to the signalling rate

equal to one half the bandwidth of ideal channel

⇒ The time constant of a series R-C circuit is given by

R/C

RC

^{2}

RC

R

^{2}C

⇒ If a two port network is represented by an equivalent T network, the impedance of shunt arm in terms of ABCD parameters is equal to

1/C

(A - 1)/C

1/B

(D - 1)/C

⇒ If sound wave has an intensity of 10 Pa. The dB level is about

1.139 dB

11.39 dB

113.9 dB

1139 dB

⇒ In 8085, the pins for SID and SOD are

4 and 5 respectively

5 and 4 respectively

3 and 4 respectively

4 and 3 respectively

⇒ It is required to measure a low magnitude high frequency current. The proper instrument is

moving iron

dynamometer

thermocouple

induction

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Copper | 1. | produces discrete energy level just above valence band |

B. | Rubber | 2. | produces discrete energy level just below conduction band |

C. | Antimony | 3. | large forbidden gap |

D. | Boron | 4. | valence and conduction bands overlap |

A-1, B-2, C-4, D-3

A-4, B-1, C-2, D-3

A-4, B-3, C-1, D-2

A-2, B-1, C-3, D-4

⇒ In a rectangular waveguide

the broad width is generally labelled '

*a*' and height '

*b*'

the broad width is generally labelled '

*b*' and height '

*a*'

any one of the dimensions may be labelled '

*a*' and the other '

*b*'

the length is labelled as '

*a*'

⇒ For 10 bit PCM system, the signal to quantization noise ratio is 62 dB. If the number of bits is increased by 2, then the signal to quantization noise ratio will

increased by 6 dB

increased by 12 dB

decreased by 6 dB

decreased by 12 dB

⇒ An ac sinusoidal wave has an rms value of 10 V. The peak to peak value is

10 V

0 V

14.14 V

28.28 V

⇒ 11101

_{2}x 10001

_{2}=

111101101

111101100

11110

1100110

⇒ An ammeter is

secondary instrument

absolute instrument

recording instrument

integrating instrument

⇒ Ferrites have

low copper loss

low eddy current loss

low resistivity

higher specific gravity compared to iron

⇒ An amplifier operating over a frequency range of 18 to 20 MHz has 10 kΩ input resistance. At a temperature of 27° C, the noise voltage at input of amplifier is (Boltzman constant

*k*= 1.38 x 10

^{-23}J/K)

18.2 μV

182 μV

16.2 μV

162 μV

⇒ The binary number 0.10110111101 is equal to hexadecimal number

B3A

B5A

B7A

BA7

⇒ Consider the following as regards cumulative disribution function F(

*x*)

- 0 ≤ F(
*x*) ≤ 1 - F(- ∞) = 0
- F(∞) = 1
- F(
*x*_{1}) ≤ F(*x*_{2}) If*x*_{1}<*x*_{2}

1 and 2 only

1, 2 and 3 only

1, 2, 3 and 4

2 and 4

⇒ When the circuit is switched on, the loop gain of a Wien bridge oscillator is

1

more than 1

less than 1

about 0.5

⇒ A full wave rectifier circuit using centre tapped transformer and a bridge rectifier are fed at 100 V, 50 Hz. The frequencies of outputs in these two rectifiers are

100 Hz each

50 Hz each

100 Hz and 50 Hz

50 Hz and 100 Hz

⇒ A capacitor can be represented by a capacitance C in parallel with a resistance R. For a good capacitor, the resistance R should be

very high

high

very low

low

⇒ In all pure metals, temperature coefficient of resistance is positive.

TRUE

FALSE

⇒

Match the following:

List I (Microwave device) | List II (Application) | ||
---|---|---|---|

A. | Reflex Klystron | 1. | Wideband amplification |

B. | TWT | 2. | Very low power amplification |

C. | Cavity Klystron | 3. | Low power FM generation |

D. | Maser | 4. | Frequency multiplication |

A-1, B-2, C-3, D-4

A-4, B-3, C-2, D-1

A-3, B-4, C-1, D-2

A-3, B-1, C-4, D-2

⇒ The energy of constant amplitude complex valued exponential sequence is ...

A

^{2}

∞

1

0

⇒ A 24 mm long conductor has a resistance of 128 Ω. The change in resistance is 13.3 Ω and change in length is 1.6 mm under tension. The gauge factor is

1.2

1.6

2.1

2.6

⇒

**Assertion (A):** Ferrites are very useful at very high frequencies.

**Reason (R):** Ferrites have high permeability and high resistivity.

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