Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | Load Z_{L} for maximum power transfe |

A. | R [Wrong Answer] |

B. | R + jωL [Wrong Answer] |

C. | R - jωL [Correct Answer] |

D. | none [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 fully charged mobile phone with a 12 V battery is good for a 20 minute talktime. Assume that, during the talk time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk t

220 J

12 kJ

13.2 kJ

14.4 kJ

⇒ In analog signal given below is sampled at such a rate that the samples of signal can be given to a collection of buffers having capacity of either 24 samples/sec. or 25 samples/sec. The sampling rate is minimum such that it fully utilizes the collection of both types of buffers

*m(t)*= 2 sin 480p

*t*+ 3 sin 720 p

*t<*

600 H

300 H

1200 H

2400 H

600 H

*z*300 H

*z*1200 H

*z*2400 H

*z*

⇒ The normal operation of JFET is

constant voltage region

constant current region

both constant voltage and constant current regions

either constant voltage or constant current region

⇒ Maximum rectification efficiency for a half wave rectifier is

1

0.88

0.5

0.406

⇒

A-2, B-3, C-4

A-4, B-3, C-2

A-5, B-4, C-3

A-1, B-2, C-5

⇒ What is the characteristic impedance at 10 MHz?

547.7 Ω

54.7 Ω

5.47 Ω

.547 Ω

⇒ Which of the following is the fastest switching device?

JFET

BJT

MOSFET

Triode

⇒ Two voltages are -5 V and -10 V. In positive logic

-5 V is 1 and -10 V is 0

-10 V is 1 and -5 V is 0

-5 V is 1 in some circuits and 0 in others

-10 V is 1 in some circuits and 0 in others

⇒ A remote control for TV uses

LED in receiver and photodiode in transmitter

LED in transmitter and photodiode in receiver

LED in both transmitter and receiver

Photodiode in both transmitter and receiver

⇒ The reverse saturation current of a diode does not depend on temperature.

TRUE

FALSE

⇒

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

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

A is true but R is false

A is false but R is true

⇒ Choose the correct statement

The reflection coefficient (r) of a transmission line is greater than 1

r varies from 0 to ∞

r is less than or equal to 1

r varies from - ∞ to + ∞

⇒ The slope of the transfer characteristics of an N-channel JFET is

positive

negative

constantly varying

zero

⇒

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

⇒ The OP-AMP circuit shown above represen

high pass filter

low pass filter

band pass filter

band reject filter

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be

15.9 radians/km

31.8 radians/km

63.6 radians/km

105.4 radians/km

⇒ Assuming a minimum angle of elevation of 5°, a geosynchronous satellite remains in line-of-sight for __________ percentage of Earth's surface.

30.3

42.4

50

25

⇒ Which of the follow

Voltage series feedback and decrease I/P impedance.

Voltage shunt feedback and decrease I/P impedance.

Voltage series feedback and increase I/P impedance.

Voltage shunt feedback and increase I/P impedance.

⇒

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

⇒ Consider the CMOS circuit shown, where the gate voltage V

⇒ In a oscillator, a sine wave generator starts at

Pure sine wave

Pure cosine wave

Unity for

2∪(

⇒ Sampling frequency

100 Hz

200 Hz

400 Hz

none of these

⇒ A line has an attenuation of 0.054 Np/m. The attenuation in decibels is

4.7 dB/m

0.47 dB/m

0.54 dB/m

5.4 dB/m

⇒ The root locus branches

start from open loop poles and terminate at zeros

start from open loop zeros and terminate at poles

may start from pole or zero and terminate at another pole or zero

none of the above

⇒ Consider the following statements about root locus

1, 2 and 3

1 and 2 only

1 only

2 and 3 only

⇒ Fourier analysis indicate that a square wave can be represented as

a fundamental sine wave and odd harmonics

a fundamental sine wave and even harmonics

a fundamental sine wave and harmonics

fundamental and subharmonic sine waves

⇒ In 8085 microprocessor, a RIM instruction is used to

disable the interrupts 7.5, 6.5, 5.5

enable the interrupts 7.5, 6.5, 5.5

read in the serial input data

none of the above

⇒

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

A is wrong but R is correct

⇒ The symbol shown in figure represen

P-channel MOSFET

UJT with N-type base

N-channel DEMOSFET with internal zener protection

P-channel DEMOSFET with internal zener protection

⇒ Using 4-bit numbers (

1011

1101

1100

0101

⇒ The normal operation of JFET is

constant voltage region

constant current region

both constant voltage and constant current regions

either constant voltage or constant current region

⇒ Maximum rectification efficiency for a half wave rectifier is

1

0.88

0.5

0.406

⇒

Match the following:

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

A. | Flash converter ADC | 1. | requires conversion time of a few μs |

B. | Dual slope ADC | 2. | requires DAC |

C. | Successive approximation ADC | 3. | minimizes the effect of power supply interference |

4. | requires complex hardware | ||

5. | is a tracking ADC |

A-2, B-3, C-4

A-4, B-3, C-2

A-5, B-4, C-3

A-1, B-2, C-5

⇒ What is the characteristic impedance at 10 MHz?

547.7 Ω

54.7 Ω

5.47 Ω

.547 Ω

⇒ Which of the following is the fastest switching device?

JFET

BJT

MOSFET

Triode

⇒ Two voltages are -5 V and -10 V. In positive logic

-5 V is 1 and -10 V is 0

-10 V is 1 and -5 V is 0

-5 V is 1 in some circuits and 0 in others

-10 V is 1 in some circuits and 0 in others

⇒ A remote control for TV uses

LED in receiver and photodiode in transmitter

LED in transmitter and photodiode in receiver

LED in both transmitter and receiver

Photodiode in both transmitter and receiver

⇒ The reverse saturation current of a diode does not depend on temperature.

TRUE

FALSE

⇒

**Assertion (A):** Electron concentration *n*, hole concentration *p* and charge concentration *n*_{i} are related by *n*_{i}^{2} = *np*.

**Reason (R):** *p* type semiconductor is obtained by adding trivalent impurity to intrinsic semiconductor.

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

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

A is true but R is false

A is false but R is true

⇒ Choose the correct statement

The reflection coefficient (r) of a transmission line is greater than 1

r varies from 0 to ∞

r is less than or equal to 1

r varies from - ∞ to + ∞

⇒ The slope of the transfer characteristics of an N-channel JFET is

positive

negative

constantly varying

zero

⇒

**Assertion (A):** The frequency of light used for photoelectric emission is high.

**Reason (R):** As per Einstein's equation 0.5 *mv*^{2} < *hf* - U_{w}.

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

⇒ The OP-AMP circuit shown above represen

high pass filter

low pass filter

band pass filter

band reject filter

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be

15.9 radians/km

31.8 radians/km

63.6 radians/km

105.4 radians/km

⇒ Assuming a minimum angle of elevation of 5°, a geosynchronous satellite remains in line-of-sight for __________ percentage of Earth's surface.

30.3

42.4

50

25

⇒ Which of the follow

Voltage series feedback and decrease I/P impedance.

Voltage shunt feedback and decrease I/P impedance.

Voltage series feedback and increase I/P impedance.

Voltage shunt feedback and increase I/P impedance.

⇒

**Assertion (A):** Inverse Laplace transform can be found from P(*s*) by inversion integral.

**Reason (R):** The function f(*t*) is assumed to be zero for *t* < 0.

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

⇒ Consider the CMOS circuit shown, where the gate voltage V

_{G}of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC_{0x}(W/L), is 1mA. V^{-2Both the MOSFET are in saturation regionBoth the MOSFET are in triode regionn-MOSFET is in triode and p-MOSFET is in saturation regionn-MOSFET is in saturation and p-MOSFET is in triode region}⇒ In a oscillator, a sine wave generator starts at

*t*= 0. It consist ofPure sine wave

Pure cosine wave

Unity for

*t*> 02∪(

*t*) - 1⇒ Sampling frequency

100 Hz

200 Hz

400 Hz

none of these

⇒ A line has an attenuation of 0.054 Np/m. The attenuation in decibels is

4.7 dB/m

0.47 dB/m

0.54 dB/m

5.4 dB/m

⇒ The root locus branches

start from open loop poles and terminate at zeros

start from open loop zeros and terminate at poles

may start from pole or zero and terminate at another pole or zero

none of the above

⇒ Consider the following statements about root locus

- The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
- Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
- The number of root locus branches terminating on infinity is always zero

1, 2 and 3

1 and 2 only

1 only

2 and 3 only

⇒ Fourier analysis indicate that a square wave can be represented as

a fundamental sine wave and odd harmonics

a fundamental sine wave and even harmonics

a fundamental sine wave and harmonics

fundamental and subharmonic sine waves

⇒ In 8085 microprocessor, a RIM instruction is used to

disable the interrupts 7.5, 6.5, 5.5

enable the interrupts 7.5, 6.5, 5.5

read in the serial input data

none of the above

⇒

**Assertion (A):** CCIR-B system has 625 scanning lines per frame and 2 : 1 interlace.

**Reason (R):** The aspect ratio is 4 : 3

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

A is wrong but R is correct

⇒ The symbol shown in figure represen

P-channel MOSFET

UJT with N-type base

N-channel DEMOSFET with internal zener protection

P-channel DEMOSFET with internal zener protection

⇒ Using 4-bit numbers (

*n*= 4) if*k*= 0011_{2}, how is*k*expressed in 2'*s*complement?1011

_{2}1101

_{2}1100

_{2}0101

_{2}