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Q1. | The integral of a unit impulse is |

A. | a unit step function [Correct Answer] |

B. | a ramp function of slope 1 [Wrong Answer] |

C. | a pulse function of magnitude 1 [Wrong Answer] |

D. | none of the above [Wrong Answer] |

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

⇒

**Assertion (A):** When a square periodic wave is applied to an RC circuit, the voltage across capacitor is observed to be a triangular periodic wave.

**Reason (R):** The RC circuit works as integrator and its time constant is much larger than time period of input wave.

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

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

A is true but R is false

A is false but R is true

⇒ A single phase semiconverter is feeding a highly inductive load and has a freewheeling diode across the load. The waveshape of input current is

sinusoidal

rectangular

sinusoidal or rectangular

triangular

⇒ The gauge factor of a semiconductor strain gauge is about

2

10

100

1000

⇒ A single phase cycloconverter feeds a resistance heating load. The heating power is provided by

only the fundamental component of output wave

only higher harmonics in the output wave

both fundamental and higher harmonics in the output wave

either (a) or (b)

⇒ Transistor T

_{1}operates at 30 kHz and T

_{2}operates at 300 Hz. The flicker noise is

not depend on frequency

T

_{1}> T

_{2}

T

_{1}= T

_{2}

T

_{1}< T

_{2}

⇒ LVDT is a

pressure transducer

displacement transducer

velocity transducer

acceleration transducer

⇒ A quantization error is an essential aspect of ADC

TRUE

FALSE

⇒ Minimum number of J-K flip-flop needed to construct a

*BCD*counter is

2

3

4

5

⇒ The characteristic impedance of a cable is about

300 Ω

50 Ω

5 Ω

2 Ω

⇒ In 8085 microprocessor, what is the length of IR (instruction register)?

6 bits

8 bits

12 bits

16 bits

⇒ Breakdown in dielectric may be

electrical breakdown

thermal breakdown

electrochemical breakdown

any of the above

⇒

**Assertion (A):** In a series resonant circuit current is maximum at resonance.

**Reason (R):** The inductive and capacitive reactances are equal.

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

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

A is true but R is false

A is false but R is true

⇒ A hertzian dipole has a radiation pattern with

a null in the direction of the dipole

a null in the plane perpendicular to the dipole

a peak in the direction of the dipole

none of the above

⇒ Two sinusoidal signals of equal amplitude and frequency are applied to X and Y plate of CRO respectively. The observed Lissajous pattern is a straight line. The phase shift between signals is

zero

90°

either zero or 180°

either 90° or 270°

⇒ The beam of a radar should be

very narrow

very wide

neither too narrow nor very wide

either (

*b*) or (

*c*)

⇒ The minimal function that can detect a "divisible by 3" 8421 BCD code digit (representation D

_{8}D

_{4}D

_{2}D

_{1}) is given by

D

_{8}D

_{1}+ D

_{4}D

_{2}+ D

_{8}D

_{2}D

_{1}

D

_{8}D

_{1}+ D

_{4}D

_{2}D

_{1}+ D

_{4}D

_{2}D

_{1}+ D

_{8}D

_{4}D

_{2}D

_{1}

D

_{4}D

_{1}+ D

_{4}D

_{2}+ D

_{8}D

_{4}D

_{2}D

_{1}

D

_{4}D

_{2}D

_{1}+ D

_{4}D

_{2}D

_{1}+ D

_{8}D

_{4}D

_{2}D

_{1}

⇒ In an inverting amplifier using op-amp the current input to the inverting terminal

is equal to the current through feedback resistance

is less than the current through feedback resistance

is more than the current through feedback resistance

may be equal to, less or more than current through feedback resistance

⇒ The function δ' (

*t*-

*b*) is

a step function originating at

*t*=

*b*

an impulse function originating at

*t*=

*b*

a unit doublet originating at =

*t*-

*b*

none of the above

⇒ A circuit is replaced by its Thevenin's equivalent to find current through a certain branch. If V

_{TH}= 10 V and R

_{TH}= 20 Ω, the current through the branch

will always be 0.5 A

will always be less than 0.5 A

will always be equal to or less than 0.5 A

may be 0.5 A or more or less

⇒ In Bode diagram (log magnitude plot) of the factor 1/(1 +

*j*ωT) in the transfer function the log magnitude for ω << 1/T can be approximated by

0 dB

20 log ωT dB

-20 log ωT dB

none of the above

⇒

Match the following:

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

A. | IF amplifier | 1. | Amplifier frequencies in the range of 100 kHz to 5 MHz. |

B. | RF amplifier | 2. | Current in the output flows only during a portion of the positive half of the input cycle |

C. | AF amplifier | 3. | Amplifier frequencies in the range of 0 Hz to 5 MHz |

D. | Class operation | 4. | Amplifier frequencies in the frequency range of 40 Hz to 15 kHz. |

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

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

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

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

⇒ In thermal ohm's law, temperature and power loss are analogous to

V and I respectively of ohm's law

I and V respectively of ohm's law

R and V respectively of ohm's law

I and R respectively of ohm's law

⇒ The combination of registers in 8085 is B-C, D-E, H-L only.

TRUE

FALSE

⇒ Number of fundamental cut-sets of any graph will be

same as the number of twigs

same as the number of tree branches

same as the number of nodes

equal to one

⇒ Measurement of hall coefficient enables the determination of

mobility of charge carriers

type of conductivity and concentration of charge carriers

temperature coefficient and concentration of charge carriers

fermi level and forbidden energy gap

⇒ Wood is a diamagnetic material.

TRUE

FALSE

⇒ The circuit in figure is switched on at

*t*= 0. At any time

*t*,

*i*(

*t3 + 3*

6 - 3

3 - 3

6 - 6

*e*^{-1}6 - 3

*e*^{-1}3 - 3

*e*^{-t}6 - 6

*e*^{-1}

⇒ The 2's complement representation of - 17 is

1110

1111

11110

10001

⇒ The number of flip-flops required to build a mod-19 counter is

4

5

6

7

⇒ Figure represen

NPN transistor

PNP transistor

Zener diode

Power diode

⇒ The 2's complement representation of - 17 is

1110

1111

11110

10001

⇒ The number of flip-flops required to build a mod-19 counter is

4

5

6

7

⇒ Figure represen

NPN transistor

PNP transistor

Zener diode

Power diode