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Q1. | Heat sink results in |

A. | slower dissipation of heat to atmosphere [Wrong Answer] |

B. | faster dissipation of heat to atmosphere [Correct Answer] |

C. | lower ambient temperature [Wrong Answer] |

D. | lower transistor power [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 certain network not containing any dependent sources, number of nodes = 4 and number of branches is equal to 6.

4

2

3

5

⇒ A failure rate of 0.01 percent in 1000 hours in a memory corresponds to an MTBF of

1000 hours

100000 hours

10 hours

100 hours

⇒ Which of the following is not a transducer in true sense?

Thermocouple

Piezo electric

Photo electric cell

LCD

⇒ In an ac circuit the fundamental component of current wave lags the corresponding voltage wave by 20°. The third harmonic component of current wave lags the corresponding voltage by an angle.

less than 20°

more than 20°

equal to 20°

equal to or more than 20°

⇒ In figure, the current through 2 Ω resistanc

zero

-2A

2A

1A

⇒ Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?

Measurement of unknown voltage

Measurement of resistance

Measurement of unknown current

Calibration of voltmeter

⇒ When the circuit is switched on, the loop gain of a Wien bridge oscillator is

1

more than 1

less than 1

about 0.5

⇒ The number of branches of root locus plot is equal to

the number of roots of characteristic equation

double the number of roots of characteristic equation

the number of roots of characteristic equation minus one

the number of roots of characteristic equation plus one

⇒ The main advantage of TWT over klystron is

higher bandwidth

higher gain

higher frequency

higher output

⇒ If 1 kVA transformer is used for all of the following rectifiers, the d.c. power availability will be least in case of

half wave rectifier

full wave rectifier

bridge rectifier

three phase full wave rectifier

⇒ The number of valence electrons in pentavalent impurity is

5

4

3

1

⇒ A two terminal black box contains one of the elements R, L, C. The black box is connected to 220 V as supply. The current is I, when a capacitance of 0.1 F is connected in series between the source and box, the current is 2I. The elements is

resistance

inductance

capacitance of 0.5 F

not identifiable form the given data

⇒ The range of a cordless telephone is about

1000 m

500 m

100 m

10 m

⇒ Consider the frequency modulated signal 10 cos (2p x 10

^{5}

*t*+ 5 sin (2p x 1500

*t*) + 7.5 sin (2p x 1000

*t*) with carrier frequency of 10

^{5}Hz. The modulation index is

12.5

10

7.5

5

⇒ Typical switching time for ECL is

5 nano seconds

5 micro seconds

5 milli seconds

5 seconds

⇒ A magnetic field exists around

moving charges

static charges

iron

copper

⇒ The given figure shows dB magnitude plots for type 0, type 1 and type 2 systems. Out of t

curves 1, 2, 3 are for type 0, 1, 2 systems respectively

curves 1, 2, 3 are for type 2, 1, 0 systems respectively

curves 1, 2, 3 are for type 1, 0, 2 systems respectively

curves 1, 2, 3 are for type 1, 2, 0 systems respectively

⇒ Which of the following devices is a 'hot-electron' diode?

Thermionic tube diode

Schottky-Barrier diode

Thomson-Deletion diode

Thermal electron diode

⇒ A sine wave of voltage varies from zero to maximum of 200V. How much is the voltage at the instant of 30° of the cycle?

50 V

82.8 V

100 V

173.2 V

⇒ Which of the following statement is incorrect?

Z

_{0}is an ac characteristic that is the same for any length of time

The characteristic impedance can be measured approximately with a sensitive ohm meter

A line terminated in its Z

_{0}is a flat or non-resonant line

A twin lead has higher Z

_{0}but lower losses than coaxial cable

⇒ Which of the following devices is used in the microprocessors?

JFET

BJT

MOSFET

CMOS

⇒ A TV picture is to be transmitted over a channel of 6 MH

*z*bandwidth at a 35 dB S/N ratio. The capacity of the channel is

50 M

*bps*

100 M

*bps*

36 M

*bps*

72 M

*bps*

⇒ A voltage gain of a CE amplifier connected in collector to base configuration is 50. Collector to base resistor R

_{F}= 1 kΩ, R

_{C}= 4Ω, the O/P resistance R

_{0}=?

800 Ω

813 Ω

817 Ω

819 Ω

⇒ Calculate cut off frequency for dominant mode in rectangular waveguide if dimensions are

*a*= 2,

*b*= 1 cm.

7.5 GHz

1.5 GHz

15 GHz

150 GHz

⇒ A pulsed radar produces 1 μ sec pulses at a rate of 1000 per second. The duty cycle is

0.001

0.01

0.1

1

⇒ With a JK master-slave flip-flop the master is clocked when the clock is __________ , and the slave is triggered when the clock is __________ .

low, low

high, low

low, high

high, high

⇒ In a picture tube, the video signal is applied to

cathode

grid

any anode

either cathode or grid

⇒ In a virgin specimen of iron, the direction of spontaneous magnetisation varies from domain to domain.

TRUE

FALSE

⇒ A network N is dual of network N if

both of them have same mesh equation

both of them have same node equation

mesh equation of one are the node equations of the other

KCL and KVL equations are the same

⇒ The expression A ** B / C + D is equivalent to

AB / C + D

AB / C + D

AB / (C + D)

None of the above