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Q1. | In which of the following device electrons will be the majority carriers? |

A. | P-type semiconductor [Wrong Answer] |

B. | N-type semiconductor [Wrong Answer] |

C. | N-P-N transistor [Wrong Answer] |

D. | P-N-P transistor [Correct Answer] |

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

⇒

**Assertion (A):** Synchronous counter has higher speed of operation than ripple counter

**Reason (R):** Synchronous counter uses high speed flip flops.

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

⇒ The 2's complement representation of the decimal number -4 is

100

1100

1011

1010

⇒ When a plane wave travelling in free space is incident normally on a medium having ε

_{r}= 4.0, then fraction of power transmitted into the medium is given by

42956

42737

42738

42861

⇒ In a communication system, noise is most likely to affect the signal

at the receiver

at the transmitter

at the information source

in the channel

⇒ In VHS format width of audio track is

5 mm

2 mm

1 mm

0.1 mm

⇒ The logic realized by the circuit shown in figure belo

F = A - C

F = A + C

F = B ⊙ C

F = B ⊕ C

⇒ Minimum number of J-K flip-flop needed to construct a

*BCD*counter is

2

3

4

5

⇒ Maximum effective aperture of an antenna which is operating at a wavelength of 3 meters and has a directivity of 100

71.68 m

^{2}

716 m

^{2}

7.16 m

^{2}

71.6 m

^{2}

⇒ Microwave signals transmitted towards the sky are

strongly absorbed by the ionosphere

strongly reflected by the ionosphere

transmitted through the ionosphere

unable to reach the ionosphere because of strong absorption in the lower atmosphere

⇒ The ratio of tangential component of electric field at the surface of a conductor and the linear current density resulting from this field is __________ impedance

characteristic

critical

surface

polarizing

⇒ The opposition of an inductor to current flow

depends only on the resistance of the coil

depends on the magnitude of the applied voltage

varies directly with frequency

varies inversely with frequency

⇒ The ratio of impurity atoms to intrinsic semiconductor atoms in an extrinsic semiconductor is about.

0.0486111111111111

0.736111111111111

1 : 100000

1 : 10

^{8}

⇒ A wire is carrying current

*I*. The field intensity H at a distance

*r*from the wire

is directed towards wire

is directed away from wire

is tangential every where to a circle of radius

*r*

none of the above

⇒ Power monitor and reflectometer use the principle of

directional coupler

klystron amplifier

Gunn diode

TWT

⇒ A short-circuit is that which is

used short pieces of wire

goes only a short distance

is used for dimming light

offer very low resistance path for current to flow

⇒ A capacitor whose capacitance C

_{t}= C

_{0}(1- cos ω

*t*) is fed by a sinusoidal voltage

*v*= V

_{0}sin ω

*t*. The equation for current

*i*is

ω C

_{0}V

_{0}cos ω

*t*

ω C

_{0}V

_{0}sin ω

*t*

ω C

_{0}V

_{0}(cos ω

*t*- cos

^{2}ω

*t*)

none of the above

⇒ In an

*n*type semiconductor

number of free electrons and holes are equal

number of free electrons is much greater than the number of holes

number of free electrons may be equal or less than the number of holes

number of holes is greater than the number of free electrons

⇒ The polarities of the magnetised iron rod of

A is N, B is S and C is neutral

A is N, B is S and C is S

A is N, B is N and C is S

A is S, N is S and C is N

⇒ The storage capacity of audio CD is 540 Mb per side.

TRUE

FALSE

⇒ A rectangular waveguide, in dominant TE mode, has dimensions 10

*cm*x 15

*cm*. The cut off frequency is

10 GH

*z*

1 GH

*z*

15 GH

*z*

25 GH

*z*

⇒ The probability giving distribution of electrons over a range of allowed energy levels is known as

Maxwell's Distribution

Fermi-Dirac Distribution

Richardson Dushman Distribution

none of the above

⇒ A receiver having poor IF selectivity will also have poor

sensitivity

double spotting

blocking

all of the above

⇒ If t is relaxation time and t

_{c}is average time between collisions, then in an isotropic metal

t = t

_{c}

t < t

_{c}

t

_{c}< t

T = 0.01 t

_{e}

⇒ A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is

2.44 mV

24.4 mV

1.2 V

none of the above

⇒ If the midband gain of an amplifier is 40 dB, the gain at half power frequency is

37 dB

30 dB

20 dB

13 dB

⇒ At resonance the network function magnitude will be

*k*/

*a*

*k*/

*b*

*c*

*k*/

*a*+

*b*

⇒ A signal

*x*(

*t*) = 100 cos (24p x 10

^{3}

*t*) is ideally sampled with a sampling period of 50 μ sec and then passed through an ideal low pass filter with cut off frequency of 15 kHz Which of the following frequencies are present at the filter output?

12 kHz only

8 kHz only

12 kHz and 9 kHz

12 kHz and 8 kHz

⇒ The fourier transform of the half cosine pulse as shown below is _______

0.5 {sin [0.5(

*f*- 1)] + sin [0.5 (

*f*+ 1)]}

0.25 [sin c[0.25 (

*f*- 2)1 + sin c[0.25(

*f*+ 2)]]

0.5 {sin c [0.5 (

*f*- 1)] + sin c [0.5 (

*f*+ 1)]}

sin c(

*f*- 0.5) + sin c (

*f*+ 0.5)

⇒

**Assertion (A):** Secondary instruments require calibration at frequent intervals.

**Reason (R):** Secondary instruments have many errors.

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 R is false

A is false R is true

⇒ The slope of log magnitude asymptote changes by - 40 dB/ decade at a certain frequency and the error between asymptote and actual curve is - 6 dB. This means that

a double pole is present

a pair of complex conjugate poles is present

either a double pole or a pair of complex conjugate poles is present

either a pole or zero at that frequency is present