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Q1. | For a reactance function H(s), the slope dH (jω)/dω is |

A. | 0 [Wrong Answer] |

B. | always positive [Correct Answer] |

C. | always negative [Wrong Answer] |

D. | either 0 or positive [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 :**

⇒ A copper specimen has resistivity equal to 1.8 x 10

^{-8}ohm-m at room temperature. At a temperature of 700 K, the resistivity is likely to be

1.6 x 10

^{-8}Ω-m

2 x 10

^{-8}Ω-m

3 x 10

^{-8}Ω-m

6 x 10

^{-8}Ω-m

⇒ The following components are used to measure power output of a 2 kW TWT amplifier

- TWT
- Low pass/High pass filter
- Low power 20 dB attenuator
- 40 dB directional coupler with matched load
- Power meter.

1, 4, 2, 3, 5

1, 3, 4, 2, 5

1, 2, 4, 3, 5

1, 4, 3, 2, 5

⇒ All of the output pulses are at full transmitter power for a strong signal in all of the following except

PWM

PAM

PFM

PCM

⇒ In an amplifier circuit the emitter is at ac ground potential in a

CB circuit

CC circuit

CE circuit

both CB and CE circuit

⇒ When

*x*(

*n*) is real then the Fourier series coefficients are correlated as __________ .

*a*

_{-k}=

*a*

_{k}^{*}

*a*

*=*

_{k}*a*

*k*

^{*}

*a*

_{k+1}=

*a*

_{k}_{*}

*a*

_{-k+1}=

*a*

_{k}^{*}

⇒ In the diode circuit shown in figure the diodes are ideal. The impedance seen by source is

1 k ohm

2 k ohm

0.5 k ohm

infinite

⇒ To prevent a DC return between source and load, it is necessary to use

resistor between source and load

inductor between source and load

capacitor between source and load

either (a) or (b)

⇒ Two numbers are 131 ± 5 and 629 ± 3. The sum of the numbers with range of doubt is

760 ± 8

760 ± 2

760 + 8

760 - 8

⇒ Class A and class B chopper

operate in first quadrant

operate in second quadrant

class A chopper operates in first quadrant while class B operates in second quadrant

may operate in either first or second quadrant

⇒ The core of a solenoid is made of material of relative permeability μ

_{r}. A small cavity area

*d*A and length

*dl*is cut in the core. If it is desired that flux density in the cavity should be equal to B

_{0}

the fields inside and outside the cavity must be equal

the field inside the cavity must be made stronger than field outside the cavity

the field inside the cavity must be made weaker than the field outside the cavity

none of the above

⇒ In CE amplifier the base current is very high.

TRUE

FALSE

⇒ AC hum is picked up from power cables

TRUE

FALSE

⇒ If the repeller voltage in a klystron oscillator is increased the transit time of electron

will be increased

will be decreased

will remain the same

either (a) or (b)

⇒ When a lead acid cell is in fully charged condition the positive and negative plates are similar.

TRUE

FALSE

⇒ Without any addition circuitry, an 8:1 MUX can be used to obtain.

some but not all Boolean functions of 3 variables

all functions of 3 variables but none of 4 variables

all functions of 3 variables and some but not all of 4 variables

all functions of 4 variables

⇒ High frequency waves are

absorbed by F

_{2}layer

affected by solar cycle

reflected by D layer

none of the above

⇒ When a plane wave is incident normally from dielectric '1' (μ

_{0}, ε

_{1}) onto dielectric '2' (μ

_{0}, ε

_{2}) the electric field of the transmitted wave is 2 times the electric field of the reflected wave. The ratio ε

_{2}/ε

_{1}is

0.5

1

2

4

⇒ Piezoelectric effect can be used to measure

force

strain

acceleration

all of the above

⇒

**Assertion (A):** The Laplace transform of a ramp is 1/*s*^{2}.

**Reason (R):** The integral of a unit step function gives an impulse function.

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

⇒

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

⇒ In the circuit of figure the current through 5 Ω resistance at

*t*= 0

^{+00.4166666666666676.67 A5.1 A}

⇒ Dielectric materials have high specific resistance.

TRUE

FALSE

⇒ Consider the following two statements about the internal conditions in an n-channel MOSFET operating in the active re

Only S2 is true

Both S1 and S2 are false

Both S1 and S2 are true, but S2 is not a reason for S1

Both S1 and S2 are true, and S2 is a reason for S1

⇒

Match the following:

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

A. | Bode | 1. | Asymptotic plots |

B. | Evans | 2. | Polar plots |

C. | Nyquist | 3. | Root locus technique |

4. | M and N circles |

A-1, B-4, C-2

A-2, B-3, C-4

A-3, B-1, C-4

A-1, B-3, C-2

⇒ Calculate the critical frequency for the E layer if maximum ionic densities are 3 x 10

^{6}

15.58 x 10

^{6}

15.58 kHz

1.58 x 10

^{3}

None of the above

⇒

*e*

^{-3}

*is a*

^{t}energy signal

power signal

Both (a) and (b)

none

⇒ While __________ is the fastest unsaturated logic gate __________ has the excellent noise immunity?

ECL, TTL

TTL, ECL

ECL, RTL

RTL, DTL

⇒ The number of programmable 16 bit registers of 6800 are

2

3

4

5

⇒ In a Gunn diode oscillator drift velocity of electron is 10

^{7}cm/s and active region length is 10 x 10

^{-4}cm. The natural frequency of oscillation is

1 MHz

10 MHz

1 GHz

10 GHz

⇒ Which of the following is not true as regards communication receiver?

It is exactly same as radio receiver used in households

It can be used, besides communication, for detection in high frequency bridges

It is designed to perform the task of low and high frequency reception better than in household receiver

Its tuning and operation are more complicated than those in household receiver