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Q1. | The function of a choke in a fluorescent lamp is |

A. | at the time of starting only [Wrong Answer] |

B. | during the working of time but not at starting time [Wrong Answer] |

C. | both at the time of starting and during working [Correct Answer] |

D. | none of the above [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 :**

⇒ In a class C power amplifier

resonant frequency of tuned circuit is equal to fundamental frequency of pulsed waveform

resonant frequency of tuned circuit is half the fundamental frequency of pulsed waveform

resonant frequency of tuned circuit has no relation to the fundamental frequency of pulsed waveform

either (b) or (c)

⇒ Figure of merit is always unity in

AM

SSB-SC

FM

All

⇒ For the polynomial

*P*(

*s*) =

*s*

^{5}+

*s*

^{4}+ 2

*s*

^{3}+ 2

*s*

^{2}+ 3

*s*+ 15 The number of roots which lie in the right half of the

*s*plane is :

4

2

3

1

⇒ The operator precedence in Java is in the order

arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation.

increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation.

comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation.

arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation.

⇒ In the case of the circuit shown in the figure V

_{io}= 10 mV dc maximum, the maximum possible output offset voltage V

_{oo}caused by the input offset voltage V

_{io}with respect to groun

60 mV dc

110 mV dc

130 mV dc

150 mV dc

⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the wave impedance for dominant mode.

130 p

1.3 p

120 p

12 p

⇒ In a radio receiver, if the intermediate frequency is too low

Image-frequency rejection will improve

Selectivity will be too sharp

The frequency selectivity of the local oscillator will have to be lowered

All of the above

⇒

Match the following:

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

A. | Silicon | 1. | Donor Impurity |

B. | Antimony | 2. | Acceptor Impurity |

C. | Gallium | 3. | Most Commonly used semiconductor material |

D. | Germanium | 4. | Atomic number 32 |

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

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

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

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

⇒ The function shown in figure, can represent a probability density function for A _______

A = 1/4

A = 1/6

A = 1/9

A = 1/2

⇒ Find equivalent resistance. Each resistance is l &Om

5/12 Ω

5/6 Ω

6/5 Ω

6/10 Ω

⇒ Full adder circuit can be implemented by

Multiplexers

Half adders

AND or OR gates

Decoders

⇒ For a nonlinear resistance

*v*-

*i*plot is not a straight line

resistance increases as current increases

resistance decreases as current increases

current decreases as voltage increases

⇒ The decimal equivalent of the binary number 10110.0101011101 is

22.24082165

22.340821675

22.3408213125

22.3408203125

⇒ A junction FET, can be used as a voltage variable resistor

at pinch-off condition

beyond pinch-off voltage

well below pinch-off condition

for any value of V

_{DS}

⇒ In the absence of noise, if C is channel capacity in bits/s, δ

*f*is channel bandwidth in Hz and N is number of coding levels. Then

C = log

_{2}N

C = (δ

*f*) log

_{2}N

C = 2 (δ

*f*) log

_{2}N

C = 0.5 (δ

*f*) log

_{2}N

⇒ The maximum effective aperture of an antenna which is operating at wavelength of 2 m and has a directivity of 100 is __________ .

15.92

31.84

3.184

1.592

⇒ The network shown in figur

reciprocal

reciprocal and symmetrical

non-reciprocal

unsymmetrical

⇒ To find current in a resistance connected in a network, Thevenin's theorem is used V

_{TH}= 20 V and R

_{TH}= 5 Ω. The current through the resistance

is 4 A

is 4 A or less

is less than 4 A

may be 4 A or less or more than 4 A

⇒ The number of layers in a Shockley diode are

2

3

4

2 or 3

⇒ A dc chopper V = 500 V feeds an electric fraction dc series motor. The chopping frequency is 400 Hz. The series inductance required to limit the maximum current swing to 10 A is

20 mH

about 31 mH

about 51 mH

about 92 mH

⇒ Assuming accumulator contain A 64 and the carry is set (1).What will register A and (CY) contain after RAR?

4 DH, 0

D 3H, 0

4 DH, 1

53 H, 0

⇒ Which of the following statements is true regarding the fundamental mode of the metallic waveguides sh

Only P has no cutoff- frequency

Only Q has no cutoff- frequency

Only P has no cutoff- frequency

All there have cut-off frequency

⇒ When an SCR is reverse biased

two junctions are reverse biased and one junction is forward biased.

all the three junctions are reverse biased.

one junction is reverse biased and two junctions are forward biased.

any of the above depending on the magnitude of reverse bias.

⇒

**Assertion (A):** It is possible that a digital circuit gives the same output for different input voltages

**Reason (R):** A digital circuit is also called logic circuit.

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

⇒ An AC circuit has two branches in parallel. The current in one branch is 5 A. Then the current source

must be less than 5 A

must be more than 5 A

may be equal or more or less than 5 A

0.208333333333333

⇒ In figure which diode will conduct and what will be the value of V

_{0D3, 1 VD1, 2 VD2, 5 VD1, 5 V}

⇒ A 50 Hz current has an amplitude of 10 A. The rate of change of current at

*t*= 0.005 after

*i*= 0 and is increasing is

2221.44 A/s

0

- 2221.44 A/s

- 3141.6 A/s

⇒ Quantization error occurs in

D/A converter

A/D converter

both D/A and A/D converter

neither D/A nor A/D converter

⇒ Slotted line can be used for measurement of high frequencies

TRUE

FALSE

⇒ A tweeter should be fed from the input through a

low pass filter

high pass filter

band pass filter

band stop filter