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ISRO Technician-B
Electrician
ISRO Technician-B Electrician 2019
47

ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

47) In an intrinsic semiconductor

Number of electrons is equal to number of holes

Number of electrons is more than number of holes

Number of electrons is less than number of holes

(a), (b) or ? depending on temperature

Answer is:

Number of electrons is equal to number of holes

ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

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Related ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

48) In a transistor based oscillator, the total loop gain required to sustain oscillation is

1

0.5

-1

None of the above

Answer is:

1

49) Two electric bulbs with rating 100W, 220 V are connected in series to a 220V supply. Let the power dissipated be W1. Then the same bulbs are connected in parallel to the same supply. Let the power dissipated be W2. W1/W2 is

2

0.25

4

0.5

Answer is:

4

50) If the voltage applied to a resistor decreases by 1% and the value of the resistance increases by 1% what is the approximate change in the power consumption in the resistor?

-1%

-2%

-3%

-4%

Answer is:

-3%

51) Filament resistance of 20W bulb and 40W bulb, both rated to same voltage of operation is in the ratio

1:2

2:1

1:4

4:1

Answer is:

2:1

ISRO Technician-B Electrician Question Paper - 2019 (Set - 1) with Answer Key

For more MCQ's Click Here