Q1. | The stationary process has |

A. | all the statistical Properties dependent on time. [Wrong Answer] |

B. | all the statistical Properties independent of time. [Correct Answer] |

C. | aime average is equal to ensemble average. [Wrong Answer] |

D. | zero variance. [Wrong Answer] |

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Explanation:-
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⇒ The frequency of oscillation in a backward wave oscillator can be changed by

varying the voltage which controls beam velocity

varying the beam current

both by varying the beam current and by light varying the voltage which controls beam velocity

changing the rate of thermionic emission

⇒ A perfect conductor is a perfect absorber of electromagnetic waves.

TRUE

FALSE

⇒ The depth of penetration at 4 MHz is 10 cm, then at 2.5 MHz it is

62.5 cm

13 cm

6.25 cm

8 cm

⇒ For a good public address system the sound intensity at the farthest point should be at least

20 dB over threshold of hearing

40 dB over threshold of hearing

80 dB over threshold of hearing

120 dB over threshold of hearing

⇒ A microcomputer has a 64 K memory. What is the hexadecimal notation for the first memory location?

0

FFFF

0FFF

3FFF

⇒ Radiation intensity does not depend upon

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antenna width

both (a) and (b)

none of the above

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dual slope A/D converter

single slope A/D converter

successive approximation A/D converter

either (a) or (b)

⇒ A 37 bit mantissa has an accuracy of

6 decimal places

8 decimal places

10 decimal places

11 decimal places

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**Assertion (A):** A half cycle of sine wave can be expressed as sum of sine wave and another sine wave shifted by *T*/2 where T is the time period.

**Reason (R):** The function *u*(*t* - *t*_{0}) - *u*(*t* - *t*_{0} - T) is a gate function occuring at *t* = *t*_{0} and of duration T.

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

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ A monostable multivibrator has

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one stable state

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none of the above

⇒ An amplifier with resistive -

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will be stable for all frequencies

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⇒ The force in a magnetic field is given by F =

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F and

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F and

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F and

*v*, F and B are mutually perpendicular to each other and

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All the four components are perpendicular to each other

⇒ For the circuit in figure, fed by a unit step voltage,

*v*

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⇒ Which of the following is correct for a driving point functions?

The real parts of all poles must be negative

The real parts of all poles and zeros must be negative

The real parts of all poles and zeros must be negative or zero

The real parts of all zeros must be negative

⇒ FET amplifier is more difficult to analyse than BJT amplifier.

TRUE

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⇒

**Assertion (A):** Silicon is preferred over germanium in manufacture of semiconductor devices.

**Reason (R):** Forbidden gap in silicon is more than that in germanium.

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

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**Assertion (A):** The steady state response, of a stable, linear, time invariant system, to sinusoidal input depends on initial conditions.

**Reason (R):** Frequency response, in steady state, is obtained by replacing *s* in the transfer function by *j*ω

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

Both A and R are correct but R is not correct explanation of A

A is correct but R is wrong

R is correct but A is wrong

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ac emitter current and ac emitter resistance

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**Assertion (A):** A sine wave with slew rate distortion looks rectangular

**Reason (R):** The maximum rate of output voltage change is called slew rate

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

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⇒ For a MOS capacitor fabricated on a P-type semiconductor, strong inversion occurs when

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surface potential is +

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0.37 A/s

0

⇒ A single element strain gauge bridge has two fixed resistances R

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0.0035

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⇒ Which one of the following is a D to A conversion technique?

Successive approximation

Weighted resistor

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⇒

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**Reason (R):** If the time constant L/R of the load in chopper is low the current may become discontinuous.

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

Both A and R correct but R is not correct explanation of A

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⇒ Ferrites are

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ferrimagnetic materials

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⇒ FM broadcast is used in

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both VHP and UHF range

⇒ As temperature increases

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the forbidden energy gap in silicon and germanium decrease

the forbidden energy gap in silicon decreases while that in germanium decreases

the forbidden energy gap in silicon increases while that in germanium decreases

⇒ A P-N junction offers

high resistance in forward as well as reverse direction

low resistance in forward as well as reverse direction

conducts in forward direction only

conducts in reverse direction only