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Q1. | MOSFET can be used as a |

A. | current controlled capacitor [Wrong Answer] |

B. | voltage controlled capacitor [Correct Answer] |

C. | current controlled inductor [Wrong Answer] |

D. | voltage controlled inductor [Wrong Answer] |

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

⇒ Pico-farad is equal to

10

^{-6}farad

10

^{-12}farad

10

^{-3}farad

10

^{-9}farad

⇒ In a D latch

D drives R and D drives S

D drives S and D drives R

D drives both R and S

D drives both R and S

⇒ Norton's equivalent circuit

is same as Thevenin's circuit

has no relation with Thevenin's circuit

is dual of Thevenin's circuit

is reciprocal of Thevenin's circuit

⇒ A single phase full converter can operate in

4 quadrants

3 quadrants

2 quadrants

1 quadrant

⇒ The Central Processing Unit (CPU) of the 16-processor system developed by hardware and software teams of C-DOT, Bangalore is configured around

Motorola 68020

Motorola 68040

Intel 80386

Intel 80486

⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The output signal-to-noise ratio is

100

50

10

5

⇒ 2's complement of (-24) =

11101000

1001000

1111111

111111

⇒ In figure, the switch is initially open. At

*t*= 0 switch is closed.

*v*

_{c}(0

^{+}) and

*i*

_{L}(0

^{+})

60 V and - 0.3 A

150 V and zero

zero and 0.3 A

90 V and - 0.3 A

⇒ A triangular Pulse of 10 V peak is applied to a capacitor of 0.4 F. The change of the capacitor and its wavefor

8 rectangular

8 triangular

4 triangular

4 rectangular

⇒ In which of the following is the width of junction barrier very small?

Tunnel diode

Photo diode

PIN diode

Schottky diode

⇒ The time base of a high frequency CRO whose screen diameter is 10 cm is set at 10 μ sec/cm. The lowest frequency which can be fully displayed on the screen is

more than 100 kHz

equal to 100 kHz

equal to 10 kHz

less than 10 kHz

⇒ In a CE transistor amplifier, when collector-emitter voltage increases

the instantaneous operating point moves up the load line

the instantaneous operating point moves down the line

load current increases

none of the above

⇒ In a diode rectifier with a capacitance input filter, a surge current is likely to flow when the circuit is switched on. The cause of this surge current is

the non linear behaviour of diodes

the capacitor acts as a short circuit at the instant of switching,

the inductance of leads

both (a) and (b)

⇒ A network is said to be two port network if there is

- no independent source in the network
- no dependent source in the network
- non-linear component in the circuit
- no external connection exist between I/P and 0/P

1, 2, 3

3, 4, 2

1, 3, 4

4, 3, 1, 2

⇒ On which bands, do the optical fibers operate?

- Ultra violet band
- Ultra high frequency band
- Visible light band
- Infrared band

1 only

1 and 2 only

1, 2 and only

1, 3 and 4

⇒ The electric energy required to raise the temperature of a given amount of water is 1000 kWh. If heat losses are 25%, the total heating energy required is __________ kWh.

1500

1250

1333

1000

⇒ Which of the following real expressions is incorrect in Pascal?

`Y - X `

`(A + B) (C + D)`

`X / Y - Z `

`P * Z - 5.0`

⇒ The simplest register is

buffer register

shift register

controlled buffer register

bidirectional register

⇒ The given figure shows a pole zero diagram. The transfer function G(

*j*1

0.5 ∠0

2.7 ∠- 31°

2 ∠45°

2 ∠- 67.4°

⇒ Which one is a causal system?

*y*(

*n*) = 3

*x*[

*n*] - 2

*x*[

*n*- 1]

*y*(

*n*) = 3

*x*[

*n*] + 2

*x*[n + 1]

*y*(

*n*) = 3

*x*[

*n*+ 1] + 2

*x*[

*n*- 1]

*y*(

*n*) = 3

*x*[

*n*+ 1] 2

*x*[

*n*- 1] +

*x*[

*n*]

⇒

Match the following:

List I (F.T and F.S) | List II (Properties) | ||
---|---|---|---|

A. | Fourier Series | 1. | Discrete, Periodic |

B. | Fourier Transform | 2. | Continuous, Periodic |

C. | Discrete Time Fourier | 3. | Discrete aperiodic |

D. | Discrete Fourier Transform | 4. | Continuous, aperiodic |

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

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

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

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

⇒ Brewster angle is the angle for which there is

no reflection and the incident wave is vertically polarized

reflection and the incident wave is horizontally polarized

no reflection and the incident wave is horizontally polarized

none of the above

⇒ If a EM wave propagating in z direction then

component of EM wave will exist in

*z*direction

component of EM wave will not exist in

*z*direction

component of EM wave will exist in

*y*direction

component of EM wave will exist in

*x*direction

⇒ With respect to the following 555 timer circuit what will be the value of R

_{A}and R such that the LED turns on for a duration of 10

*ms*every time it receives negative trigger pulse. LED operating current = 20

*m*A, V

_{f}= 1.4 V, V

*o*

_{on}= 13.4 V and C = 0.22

*nf*

41.4 KΩ, 600 Ω

45 KΩ, 630 Ω

43.5 KΩ, 580 Ω

44.9 KΩ, 600 Ω

41.4 KΩ, 600 Ω

45 KΩ, 630 Ω

43.5 KΩ, 580 Ω

44.9 KΩ, 600 Ω

⇒ The MOSFET is almost ideal as a switching device because

it has linear characteristics

it works progressively

it consumes low power

it has longer life

⇒ Kirchoff's laws are applicable to

dc only

ac sinusoidal wave only

dc and ac sinusoidal waves

all wave shapes

⇒ An SR flip flop can be built using NOR gates or NAND gates.

TRUE

FALSE

⇒ The amount of time between the creation and recombination of a free electron and hole is called

relaxation time

life time

lorentz time

collision time

⇒ Highest value of autocorrelation function 100 sin 50 p

50

zero

100

100/p

⇒ Two rectangular waveforms of duration t

Triangular

Rectangular

Trapezoidal

Semi-circular

⇒ The MOSFET is almost ideal as a switching device because

it has linear characteristics

it works progressively

it consumes low power

it has longer life

⇒ Kirchoff's laws are applicable to

dc only

ac sinusoidal wave only

dc and ac sinusoidal waves

all wave shapes

⇒ An SR flip flop can be built using NOR gates or NAND gates.

TRUE

FALSE

⇒ The amount of time between the creation and recombination of a free electron and hole is called

relaxation time

life time

lorentz time

collision time

⇒ Highest value of autocorrelation function 100 sin 50 p

*t*is50

zero

100

100/p

⇒ Two rectangular waveforms of duration t

_{1}and t_{2}seconds are convolved. What is the shape of the resulting waveform?Triangular

Rectangular

Trapezoidal

Semi-circular