3) hfe of a transistor increases if

Base width is increased

Doping of base is reduced

Power rating of the transistor is increased

Metal can packaging is used

Answer is:

Doping of base is reduced

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

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4) XOR gate

Can be used to know whether two digital inputs are identical

Is a NOT followed by OR

Two OR gates followed by AND

Cannot be used for matching of two inputs

Answer is:

Can be used to know whether two digital inputs are identical

5) The following Hexadecimal operation yields: 0xF0-0xAA+0x10

0xA5

0x56

0x74

0x66

Answer is:

0x56

6) A binary counter to count upto 100 (decimal) needs at least

7 flipflops

6 flipflops and one OR gate

5 flipflops and two AND gates

50 flipflops

Answer is:

7 flipflops

7) What is the resistance during heating of the thermostat in a water heater?

Around 1 k Ohm

Close to Zero Ohm

Very High value upto 100 Ohm

Open

Answer is:

Close to Zero Ohm

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

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3) hfe of a transistor increases if

Doping of base is reduced

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

Related ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

4) XOR gate

Can be used to know whether two digital inputs are identical

5) The following Hexadecimal operation yields: 0xF0-0xAA+0x10

0x56

6) A binary counter to count upto 100 (decimal) needs at least

7 flipflops

7) What is the resistance during heating of the thermostat in a water heater?

Close to Zero Ohm

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key