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Q1. | The number of free electrons in acceptor atom is |

A. | 1 [Wrong Answer] |

B. | 2 [Wrong Answer] |

C. | 3 [Correct Answer] |

D. | 4 [Wrong Answer] |

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

⇒

Match the following:

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

A. | Total instantaneous value of emitter current | 1. | I_{E} |

B. | Quiescent value of emitter current | 2. | i_{E} |

C. | Instantaneous value of as component of emitter current | 3. | I_{e} |

D. | RMS value of ac component of emitter current | 4. | i_{e} |

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

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

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

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

⇒ A meter has a square law scale. For 2 A current the deflection in 90°. For a deflection of 45°, the current is

0.0416666666666667

1.5 A

1.414 A

1.61 A

⇒ A magnetic circuit has an iron length of 20 cm and air gap length 0.1 cm. If μ

_{r}= 200 then

mmf for iron and air gap are equal

mmf for iron is much less than that for air gap

mmf for iron is much more than that for air gap

either (a) or (c)

⇒ A 0 to 6 counter consist of 3 flip-flop and a combinational circuit of 2 input gates. The combinational circuit consist of

one AND gate

one OR gate

one AND and One OR

two AND gate

⇒ A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are

5 Ω and 25%

25 Ω and 20%

5 Ω and 16.7%

25 Ω and 16.7%

⇒ Armstrong F.M. transmitter performs frequency multiplication in stages

to increase the overall S/N

for convenience

to reduce the bandwidth

to find the desired value of carrier frequency with frequency deviation

⇒ In an

*n*channel JFET

I

_{D}, I

_{S}and I

_{G}are considered positive when flowing into the transistor

I

_{D}and I

_{S}are considered positive when flowing into transistor and I

_{G}is considered positive when flowing out of it

I

_{D}, I

_{S}, I

_{G}are considered positive when flowing out of transistor

I

_{S}and I

_{G}are considered positive when flowing into transistor and I

_{D}is considered positive when flowing out of it

⇒ An ammeter is

secondary instrument

absolute instrument

recording instrument

integrating instrument

⇒ What is the period of the sinusoidal signal

*x*(

*n*) = 5 cos [0.2 pn]?

10

5

1

0

⇒ The gain of an half wavelength antenna is

2.15 dB

10 dB

1.78 dB

100 dB

⇒

**Assertion (A):** For a dielectric, P = ∈_{0}(∈_{r} - 1) E.

**Reason (R):** Dipole moment per unit volume is called polarization of dielectric.

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

⇒ An instruction using immediate addressing mode in 8085 is

2 bytes long

3 bytes long

2 or 3 bytes long

1 or 2 or 3 bytes long

⇒ In Jone chopper, the commutating element

is a capacitor

is a capacitor and an inductor

is a capacitor and an auto transformer

none of the above

⇒ The total lumens emitted by a source of 1 candle are

0.4 p

4 p

2 p

8 p

⇒ The total number of channels allotted for cellular telephone is

666

333

221

111

⇒ Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are

*not*violated?

Tellegen's theorem

Reciprocity theorem

Maximum power transfer theorem

Superposition theorem

⇒ The distance between target and radar is reduced to half. Power received increases by

42751

42739

4 times

16 times

⇒ Consider the following about 'arrays' in C

- An array is a collection of similar elements.
- An array can not have 10 numbers 5 of which are ints and 5 are floats.
- An array can have ints and chars in the same array.

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ The logic function

*f*(A B, C) = Σ

*m*(0, 2, 4, 5, 6) represente

i

i, ii

i, iii

i, ii, iii

⇒ All poles and zeros of a driving point immittance function of an L-C network

should lie on the jω axis

should lie on the +ve real axis

should lie on the - ve real axis

can lie anywhere in s-plane

⇒ The main advantage of CMOS circuit is

high gain

high output impedance

low power consumption

high gain and high output impedance

⇒ An antisymmetric filter having odd number of coefficient may have a performance as

low pass

high pass

band pass

all pass

⇒ A voltage wave having 5% fifth harmonic content is applied to a series RC circuit. The percentage fifth harmonic content in the current wave will be

0.05

more than 5%

less than 5%

equal or more than 5%

⇒

Match the following:

List I (Power device) | List II (Max. frequency) | ||
---|---|---|---|

A. | Power Bipolar | 1. | MHz |

B. | Power MOSFET | 2. | 100 kHz |

C. | SCR | 3. | 10 kHz |

D. | Insulated gate bipolar transistor | 4. | 1 kHz |

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

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

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

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

⇒ In figure as the load resistance is cha

the zener current remain constant

the load current remains constant

the output voltage remains constant

the output voltage and current through

*R*remain constant

⇒ An FM transmitter has maximum frequency deviation of 75 kHz and reproduces audio signals up to 15 kHz. Minimum channel width required is __________ kHz.

180

120

90

60

⇒ The absorption of EM wave by the atmosphere depends on

polarization of waves

frequency in use

dist. from T

_{y}

height of antenna

⇒ Consider the following strings

- A
- Z2
- X3Y
- P12R
- BX

All

1, 2, 3

1, 2, 4, 5

1, 2, 3, 5

⇒ Which of the following circuits come under the class of combinational logic circuits?

- Full adder
- Full subtractor
- Half adder
- J-K flip-flop
- Counter

1 only

3 and 4

4 and 5

1, 2 and 3

⇒ A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is

100

99

1.01

0.99