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Q1. | The output of a linear system for any input can be computed in which of the following ways? |

A. | Only by summation of inpulse response by convolution integral [Wrong Answer] |

B. | Only by summation of step response by superposition integral [Wrong Answer] |

C. | Neither a nor b [Wrong Answer] |

D. | Either (a) or (b) [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 rectangular waveguide has a discontinuity in the form of reduced narrow dimension. In the equivalent circuit this discontinuity can be represented by

a shunt capacitance at the discontinuity

a shunt inductance at the discontinuity

a shunt resistance at the discontinuity

none of the above

⇒ Which of the following ICs has only one NAND gate?

7410

7420

7430

7447

⇒ A current of 3.25 A is flowing through a resistance of 34.98 Ω. The voltage drop across resistance to the appropriate number of significant figures is

113.685 V

113.68 V

113.6 V

114 V

⇒ Which of the following identifiers is invalid in Pascal?

` BETA`

`MAX 40`

`2ND`

`A MAX`

⇒ The trignometric Fourier series of an even function of time does not have

dc term

cosine term

sine term

odd harmonic terms

⇒ Eddy current loss is

proportional to frequency

independent of frequency

proportional to (frequency)

^{2}

proportional to (frequency)

^{3}

⇒

**Assertion (A):** Oxide coated cathodes are very commonly used.

**Reason (R):** Work function of oxide coated cathode is 1 eV whereas it is 4.5 eV for pure tungsten.

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

⇒ An antenna has a resistance of 50 Ω and an equivalent noise resistance of 30 Ω The noise figure in decibels is

1.6 dB

2 dB

3.6 dB

6 dB

⇒ Class A amplifiers are preferred when

minimum distortion is required

maximum voltage gain is required

output signal is desired in phase with input signal

signal having A.C. superimposed on D.C. are to be amplified

⇒ Consider the following statements

- The effect of feedback is to reduce system error
- Feedback increases the system gain at one frequency but reduces the system gain as another frequency
- Feedback can cause an originally stable system to become unstable

1, 2, 3

1, 2

2, 3

1, 3

⇒ A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is

dc

sinusoidal

rectangular

none of the above

⇒ A Charge Couple Device (CCD) is a

RAM

sequential accessed memory

content addressable memory

read only memory

⇒ A dc separately excited motor has constant field current. The armature is fed from a single phase supply through a full converter. When a = 0, speed is 500 rpm. If a = 45°, the speed is likely to be

about 350 rpm

about 250 rpm

about 175 rpm

about 125 rpm

⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is

proportional to length

proportional to square root of length

proportional to square of length

none of the above

⇒ Current requirement of a piezo buffer is about

100mA

20mA

4mA

0.4mA

⇒ A loudspeaker transformer has a turns ratio of 20 : 1. The speaker impedance is 20Ω. Primary impedance of transformer is

10 K

8 K

20 K

0.5 K

⇒

Match the following:

List I (Transmission system) | List II (Mode) | ||
---|---|---|---|

A. | Rectangular waveguide | 1. | TE/TM |

B. | Circular waveguide | 2. | TEM |

C. | Coaxial line | 3. | Quasi TEM |

D. | Microstrip line |

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

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

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

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

⇒ A cycloconverter uses

natural commutation

forced commutation

either natural or forced commutation

both natural and forced commutation together

⇒ Consider the following statements about loop antenna

- It is suitable for direction finding application
- It is a single turn or multiturn coil carrying RF current
- The loop is surrounded by a magnetic field everywhere perpendicular to the loop

1 and 2 only

1 only

1, 2, 3

2 and 3 only

⇒ Which of the following is true for RC impedance?

The lowest critical frequency is a pole

The lowest critical frequency is zero

The lowest critical frequency may be pole or zero

The lowest critical frequency is a pole but cannot be at

*s*= 0

⇒ A constant

*k*high pass filter has

*f*

_{c}= 3000 Hz. At

*f*= 1000 Hz, the phase shift is

zero

p

2 p

more than p

⇒ The upper end of the d.c. load line is called the __________ point and the lower end is the __________ point.

cut off, saturation

saturation, active

saturation, cut off

active saturation

⇒ To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized

voltage series

current series

voltage shunt

current shunt

⇒ A single phase series converter is used for

high voltage output

high current output

high voltage and high current output

improving the circuit efficiency

⇒ The logic function

*f*(A B, C) = Σ

*m*(0, 2, 4, 5, 6) represente

i

i, ii

i, iii

i, ii, iii

⇒ The charge per proton is

1.6 x 10

^{-19}C

2.6 x 10

^{-19}C

0.6 x 10

^{-19}C

1.6 x 10

^{-13}C

⇒ 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

⇒ Henry is equivalent to

Volts/Ampere

Weber/Volt

Weber/Ampere

Weber/Ampere

^{2}

⇒ In a purely inductive ac circuit the power curve is a sinusoid of the same frequency as the voltage.

TRUE

FALSE

⇒ A dynamic RAM cell which holds 5 V has to be refreshed every 20 ms so that the stored voltage does not fall by more than 0.5 V. If the cell has a constant discharge current of 0.1 pA, the storage capacitance of cell is

4 x 10

^{-6}F

4 x 10

^{-9}F

4 x 10

^{-12}F

4 x 10

^{-15}F