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Q1. | Double integration of unit step function leads to |

A. | an impulse [Wrong Answer] |

B. | a parabola [Correct Answer] |

C. | a ramp [Wrong Answer] |

D. | a doublet [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ The capacitance of a capacitor is not affected by

area of plates

thickness of plates

∈

_{r}

distance between plates

⇒ For a current transformer, the standard secondary rating is

1 A or 5 A

2.5 A

0.416666666666667

5 A or 10 A

⇒ The Boolean expression for the sub-class (Q) of all electronic instruments which are measuring instruments or are non-digital instruments with battery supply is

Q = X(Y + Z)

Q = X + YZ

Q = XY + Z

Q = XY + Z

⇒ The phase difference (

*j*ω -

*p*

_{1}) means

phasor drawn from

*p*

_{1}to

*j*ω

phasor drawn from origin to

*p*

_{1}

phasor directed from origin to

*j*ω point

phasor directed from

*j*ω to

*p*

_{1}

⇒ If

*x*

*= 2*

_{k}*for*

^{k}*k*≤ 0 and = 0 for

*k*> 0 X(

*z*) = 2/(2 -

*z*).

TRUE

FALSE

⇒ The rms voltage measured across each of the circuit element in figure is as shown, when the circuit is excited by a sinusoidal voltage E

_{s}, the rms value of the source voltage

*e*

_{s10 volt2 voltEs5 volt}

⇒ TTL is used in electronic calculators.

TRUE

FALSE

⇒ Two resistances of 2 Ω each are connected in series. A shunt having zero resistance is connected across the combination. The overall resistance will be

4 Ω

1 Ω

0.5 Ω

zero

⇒ Two identical FETs each having parameters

*g*

_{m}and

*r*

_{d}are connected is parallel. The composite FET has parameters

0.5

*g*

_{m}and 2

*r*

_{d}

0.5

*g*

_{m}and 0.5

*r*

_{d}

2

*g*

_{m}and 2

*r*

_{d}

2

*g*

_{m}and 0.5

*r*

_{d}

⇒ Figure shows an RC circuit. The magnitude plot V

_{2}/V

_{1will rise exponentially to R2/(R1 + R2) as ω → ∞will rise linearly to R2/(R1 + R2) as ω → ∞will decrease to zero as ω → ∞will rise 1 at ω = 0 and then decrease as ω → ∞}

⇒ In a carbon-zinc cell the function of the depolarizer is that

it synthesizes the decomposed electrolyte

it converts the produced hydrogen into water

it absorbs the oxygen produced in the cell

it prevents the fast chemical action on the zinc container

⇒

**Assertion (A):** The polynomial *s*^{3} + 6*s*^{2} + 12*s* + 8 is Hurwitz.

**Reason (R):** In a Hurwitz polynomial all coefficients are non-negative.

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

⇒ The resistivity of intrinsic semiconductor material is about

10

^{5}ohm-m

10

^{3}ohm-m

100 ohm-m

1 ohm-m

⇒ Consider the following applications/ advantages of radar beacons

- navigation
- target identification
- accurate tracking of enemy targets
- large increase in maximum range

1, 2, 3, 4

1, 2, 4

1, 2

2, 3, 4

⇒ Which of the following statement is false?

Bandwidth of a circuit is given by the range of frequencies lying between half-power points

Half-power points on a resonance curve are those points where power is half of that at resonance

Half-power points are also known as 3

*d*B points

At both half-power points, the p.f. = 0.707 lagging

⇒ When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common base short circuit current gain a for the transistor is

0.99

1.01

1.001

0.99

⇒

Match the following:

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

A. | Poles and zeros of lie an real axis driving point LC network | 1. | lie an real axis |

B. | Canonic LC network has | 2. | a zero |

C. | The number of Canonic networks for the given driving point function | 3. | minimum number of elements |

D. | The first critical frequency nearest the origin for RL driving point impedance | 4. | four |

5. | minimum number of elements | ||

6. | alternate | ||

7. | either a pole or zero | ||

8. | three |

A-1, B-5, C-8, D-7

A-6, B-5, C-3, D-2

A-1, B-5, C-4, D-2

A-1, B-3, C-4, D-7

⇒ It is desired to evaluate the expression

`F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

`F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]`

`F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

` X = COS(Y)`

⇒ Dielectric constant, under the condition of alternating fields, is a complex quantity.

TRUE

FALSE

⇒ The eigen values of a skew symmetric matrix are

always zero

always pure imaginary

either zero or pure imaginary

always real

⇒ In a CE amplifier circuit the dc voltage between emitter and ground

is always zero

cannot be zero

may or may not be zero

is negative

⇒ In phase shift keying the input signal is

*s*_{t}(*t*) = A cos ω_{0}*t* and *s*_{2}(*t*) = - A cos ω_{0}*t*

*s*_{1}(*t*) = *s*_{2}(*t*) = A cos ω_{0}*t*

*s*_{1}(*t*) = A cos ω_{0}*t* and *s*_{2}(*t*) = A cos (ω_{0}*t* + p/2)

*s*_{1}(*t*) = A cos ω_{0}*t* and *s*_{2}(*t*) = - A (cos ω_{0}*t* + p/2)

⇒ In a JFET, the drain current is maximum when

V_{GS} = V_{DS}

V_{GS} = pinch off voltage

V_{GS} = 0

V_{GS} is negative

⇒ Which of the following microphones is the cheapest?

Moving coil

Condenser

Ribbon

Carbon

⇒ *n*-channel MOS is

slower than *p*-channel MOS

faster than *p*-channel MOS

same as *p*-channel MOS

none of these

⇒ If a class C power amplifier has an input signal with frequency of 200 kHz and the width of collector current pulses of 0.1 ms, then the duty cycle of the amplifier will be

0.01

0.02

0.1

0.2

⇒ An RLC series circuit

resonant frequency is high

Q is high

bandwidth is large

Q is low

⇒ For a second order system ω_{n} is natural frequency, ω_{d} is frequency of damped oscillations and ζ is damping factor. Then

ω_{d} = ω_{n} ξ

ω_{d} = ω_{n} (1 - ξ)^{2}

ω_{d} = ω_{n} (1 - ξ)^{0.5}

ω_{d} = ω_{n} (1 - ξ^{2})^{0.5}

⇒ A clock signal driving a 6-bit ring counter has a frequency of 1 MHz. How long is each timing bit high?

1 ms

2 ms

3 ms

6 ms

⇒ The useful magnetic flux obtainable from any closed surface is

unity

constant

both (a) and (b)

none of the above

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