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Q1. | The terminals of a power BJT are called |

A. | emitter, base, collector [Correct Answer] |

B. | emitter, base, drain [Wrong Answer] |

C. | source, base, drain [Wrong Answer] |

D. | source, base, collector [Wrong Answer] |

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Explanation:-
Answer : ADiscuss 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 :**

⇒ The circuit shown in the figure, with R = 1/3 Ω, L = 1/4H, C = 3F has input voltage

*v*(

*t*) = sin2

*t*. The resulting current

*i*(

*t*

5 sin (2

*t*+ 53.1°)

5 sin (2

*t*- 53.1°)

25 sin (2

*t*+ 53.1°)

25 sin (2

*t*- 53.1°)

⇒

Match the following:

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

A. | h_{ie} | 1. | siemens |

B. | h_{oe} | 2. | no units |

C. | h_{fe} | 3. | ohms |

A-1, B-2, C-3

A-3, B-1, C-2

A-2, B-1, C-3

A-3, B-2, C-1

⇒ The magnitude plot of a composite signal

*x*(

*t*) =

*e*

^{2jt}+

*e*

^{3jt}is

Half wave rectified sinusoid

Full wave rectified sinusoid

Exponentially increasing sinusoid

Exponentially decreasing sinusoid

⇒ Which of the following statement regarding single-sideband (SSB) transmission is not correct?

In such transmission only or sideband is transmitted, leaving of the other sideband and the carrier

It has gained general acceptance of use in home-entertainment equipment

It is generally reserved for point-to-point communication

The amount of power and bandwidth necessary to be transmitted for a given amount of information are appreciable reduced

⇒ A broadside array is shown in figure in which the elements are placed at equal distances. The direction of maximum radiation is represented

AA

BB

CC

DD

⇒ Which is not a valid dimension statement?

DIMENSION KAT(10, 20)

DIMENSION BAT (30, 20)

DIMENSION KAT(K, 10)

DIMENSION BAT (10, 5)

⇒ The number of flip-flops required to build a mod-19 counter is

4

5

6

7

⇒ (FE35)

_{16}XOR (CB15)

_{16}is equal to

(3320)

_{16}

(FE35)

_{16}

(FF50)

_{16}

(3520)

_{l6}

⇒ To realize following function

*'f'3*

6

4

10

6

4

10

⇒ For an amplifier the power gain in decibels will be equal to voltage gain in decibels only when

R

R

R

R

⇒ When cells having different emfs are connected in parallel, a circulating current flows.

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 a correct explanation of A

A is true but R is false

A is false but R is true

⇒ When thyristors are connected in series and parallel, it may be necessary to have :

current derating

voltage derating

both current and voltage derating

none of the above

⇒ The degree of the nodes 1, 2, 3,

2

3

2 for 1, 2, 3, and 3 for 4

all 3

⇒ Q of a coil

A, B

C, D

A, C

B, D

⇒ When a wave reaches the open circuited end of a line

all the forward energy is reflected by the open circuit

all the forward energy is absorbed by the open circuit

a small portion of energy is radiated into atmosphere and the remaining energy is reflected

either (a) or (b)

⇒ For the K map of the given figure the simplified Boolean expressio

ACD + ABD + BCD

ACD + BCD

ACD + ABD

none of the above

⇒ In a synchro error detector, the output voltage is proportional to [ω(

-2

-1

1

2

⇒ The phase margin and damping ratio have no relation.

TRUE

FALSE

⇒ As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

parallel to I

perpendicular to B and parallel to I

parallel to I and B

perpendicular to both I and B

⇒ A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is

500

5

0.014

0.002

⇒ Decimal number 46 in excess 3 code =

1000 1001

0111 1001

0111 1111

1000 1111

⇒ In the signal flow graph of figure below, the gain C/R will

43048

22/15

24/23

44/23

⇒ Start and stop bit do not contain any information but are used in serial communication for

error correction

error detection

synchronization

slowing down the communication

⇒ Which characteristics of a memory chip is called dc characteristics?

Organisation

Timing characteristics

Physical dimensions

Power consumption and bus loading

⇒ The two conductors of a transmission line carry equal current I in opposite direction. The force on each conductor is

proportional to I

proportional to I

proportional to distance between the lines

proportional to I

⇒ Magnetic deflection is inversely proportional to

voltage

(voltage)

(voltage)

(voltage)

⇒ A Darlington pair is used for

low distortion

high frequency range

high power gain

high current gain

⇒ In a specimen of cast iron, a field strength of 400 AT/m cause a flux density of 0.6 T. In a specimen of silicon steel, the same value of H would cause B to be

0.6 T

more than 0.6 T

less than 0.6 T

0.6 T or less than 0.6 T

⇒ Find the Fourier transform of the half cosine pulse as shown bel

0.5 {sin

0.5 {sin

0.25 {sin

0.25 {sin

⇒ For an amplifier the power gain in decibels will be equal to voltage gain in decibels only when

R

_{0}= 0R

_{0}= R_{i}= 90R

_{0}= R_{i}R

_{i}= 0⇒ When cells having different emfs are connected in parallel, a circulating current flows.

TRUE

FALSE

⇒

**Assertion (A):** When a photoconductive device is exposed to light, its bulk resistance increases.

**Reason (R):** When exposed to light, electron hole pairs are generated in the photoconductive device.

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

⇒ When thyristors are connected in series and parallel, it may be necessary to have :

current derating

voltage derating

both current and voltage derating

none of the above

⇒ The degree of the nodes 1, 2, 3,

2

3

2 for 1, 2, 3, and 3 for 4

all 3

⇒ Q of a coil

- increases with Q increasing frequency
- varies linearly with frequency
- increase with increasing frequency because R increases at high frequency
- decrease after the peak frequency because R increases at H.F. the correct statements are

A, B

C, D

A, C

B, D

⇒ When a wave reaches the open circuited end of a line

all the forward energy is reflected by the open circuit

all the forward energy is absorbed by the open circuit

a small portion of energy is radiated into atmosphere and the remaining energy is reflected

either (a) or (b)

⇒ For the K map of the given figure the simplified Boolean expressio

ACD + ABD + BCD

ACD + BCD

ACD + ABD

none of the above

⇒ In a synchro error detector, the output voltage is proportional to [ω(

*t*)]^{n}, where ω(*t*) is the rotor velocity and*n*equals :-2

-1

1

2

⇒ The phase margin and damping ratio have no relation.

TRUE

FALSE

⇒ As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

parallel to I

perpendicular to B and parallel to I

parallel to I and B

perpendicular to both I and B

⇒ A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is

500

5

0.014

0.002

⇒ Decimal number 46 in excess 3 code =

1000 1001

0111 1001

0111 1111

1000 1111

⇒ In the signal flow graph of figure below, the gain C/R will

43048

22/15

24/23

44/23

⇒ Start and stop bit do not contain any information but are used in serial communication for

error correction

error detection

synchronization

slowing down the communication

⇒ Which characteristics of a memory chip is called dc characteristics?

Organisation

Timing characteristics

Physical dimensions

Power consumption and bus loading

⇒ The two conductors of a transmission line carry equal current I in opposite direction. The force on each conductor is

proportional to I

proportional to I

^{2}proportional to distance between the lines

proportional to I

^{3}⇒ Magnetic deflection is inversely proportional to

voltage

(voltage)

^{0.5}(voltage)

^{1.5}(voltage)

^{2}⇒ A Darlington pair is used for

low distortion

high frequency range

high power gain

high current gain

⇒ In a specimen of cast iron, a field strength of 400 AT/m cause a flux density of 0.6 T. In a specimen of silicon steel, the same value of H would cause B to be

0.6 T

more than 0.6 T

less than 0.6 T

0.6 T or less than 0.6 T

⇒ Find the Fourier transform of the half cosine pulse as shown bel

0.5 {sin

*c*[0.25(*f*- 1)] + sin*c*[2.5(*f*+ 1)]}0.5 {sin

*c*[0.5(*f*- 1)] + sin*c*[0.5(*f*+ 1)]}0.25 {sin

*c*[0.25(*f*- 1)] + sin*c*[0.25 (*f*- 1)]}0.25 {sin

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