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Q1. | A function of one of more variables which conveys information on the nature of physical phenomenon is called |

A. | Noise [Wrong Answer] |

B. | Interference [Wrong Answer] |

C. | System [Wrong Answer] |

D. | Signal [Correct Answer] |

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

⇒ Electrical contact materials used in switches, brushes and relays must possess

high thermal conductivity and high melting point

low thermal conductivity and low melting point

high thermal conductivity and low melting point

low thermal conductivity and high melting point

⇒ The number of thyristors in a single phase fully controlled bridge rectifier is

16

8

4

2

⇒ At room temperature the current in an intrinsic semiconductor is due to

holes

electrons

ions

holes and electrons

⇒ Electrons can be emitted from a metal surface due to high electric field.

TRUE

FALSE

⇒ Evaluate the value of 2 [

*u*(

*t*- 1) -

*u*(1 - 2

*t*)] (

*u*(

*t*+ 1) +

*u*(

*t*)) at

*t*= 3 sec.

0

4

∞

1

⇒ If D is diagonal and F is focal length, lens angle θ is

θ = tan

^{-1}(D/F)

θ = 2 tan

^{-1}(D/F)

θ = tan

^{-1}(D/2F)

θ = 2 tan

^{-1}(D/2F)

⇒ The polarization phenomena in Faraday rotation

is non-reciprocal

exists along perpendicular direction

exists along the axis of array

does not exist

⇒ The basic amplifier in Weinbridge oscillator consists of

CE stage followed by CE

CE stage followed by CB

CB stage followed by CE

CC stage followed by CE

⇒ When the

*i*-

*v*curve of a photodiode passes through origin the illumination is

maximum

minimum

zero

equal to rated value

⇒ Which of the following cannot be the Fourier series expansion of a periodic signal?

*x*(

*t*) = 2 cos

*t*+ 3 cos 3

*t*

*x*(

*t*) = 2 cos pt + 7 cos

*t*

*x*(

*t*) = cos

*t*+ 0.5

*x*(

*t*) = 2 cos 1.5p

*t*+ sin 3.5 p

*t*

⇒ Nyquist stability criterion uses open loop frequency response characteristics.

TRUE

FALSE

⇒ Light dependent resistors are

highly doped semiconductor

intrinsic semiconductor

lightly doped semiconductor

either (a) or (c)

⇒ For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a freq. of (

*f*is the cut off frequency)

_{c}3

*f*

_{c}3

*f*

_{c}2

*f*

_{c}2

*f*

_{c}⇒ When microwave signals follow the curvature of the earth, this is known as

the Faraday effect

ducting

tropospheric scatter

ionospheric reflection

⇒ The term 'energy spectral density' is associated with

periodic waveform

non-periodic waveform

both perodic and non -perodic waveform

none of the above

⇒ A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What percentage negative feedback should be introduced to the amplifier so that linear oscillations result?

0.0125

0.025

-0.0125

-0.025

⇒ The 2 out of 5 code has

two 0s and three 0s in each code group

one 1s and four 0s in each code group

four 1s and one 0s in each code group

three 1s and two 0s in each code group

⇒ QAM stands for

Quasi-Amplitude Modulation

Quadrature Angle Modulation

Quadrature Amplitude Modulation

None of the above

⇒ Each cell of a static RAM has

4 MOS transistors

4 MOS transistors and 2 capacitors

2 MOS transistors and two capacitors

1 MOS transistor and 1 capacitor

⇒ Consider the real expression in Pascal language

`XZ and MP + K`

`XZ + Y and MP + K`

`(MP + K + X) / Y `

`Y / (MP + K)`

⇒ System bus is the communication channel between microprocessor and peripherals.

TRUE

FALSE

⇒ Read the following statements about Excel

- It supports many arithmetic functions like SUM, ABS, EXP, INT, MOD etc.
- It supports many trigonometric functions.
- It supports IRR function to calculate interest rate.
- It supports PV function to calculate the present value of future receipts.

All

1, 2 and 3 only

1, and 2 only

1 only

⇒ Expression ++

*i*is equivalent to

*i*=

*i*+ 2

*i*=

*i*+ 1

*i*=

*i*- 1

*i*=

*i*+

*i*+

*i*

⇒ In 8085 microprocessor, a RIM instruction is used to

disable the interrupts 7.5, 6.5, 5.5

enable the interrupts 7.5, 6.5, 5.5

read in the serial input data

none of the above

⇒ If the frequency of a wave 20 Hz, the time period is

20 secs

2 secs

0.2 secs

0.05 secs

⇒ In figure, the current through

*R*is 1 A when V

_{A}= 0 and V

_{B}= 15V. If both V

_{A}and V

_{B}are increased by 15V each, current through R wil

0.0416666666666667

0.5 A

0.125

0.33 A

⇒ The content of which of the following determines the state of the CPU at the end of the execute cycle (when the interrupt is recognized)?

- Program counter
- Processor register
- Certain status conditions

1 and 2

2 and 3

1 and 3

1, 2 and 3

⇒ If the reverse voltage across a

*p*-

*n*junction is increased three times, the junction capacitance

will decrease

will increase

will decrease by an approximate factor of about 2

will increase by an approximate factor of about 2

⇒ The generally used value of EHV supply in TV receivers is

1 kV per diagonal cm

1 kV per diagonal inch

0.5 kV per diagonal cm

0, 5 kV per diagonal inch

⇒ A wave trap is a

series tuned circuit

a parallel tuned circuit

either a series tuned circuit or parallel tuned circuit

none of the above