Correct Answer:- Option-B
Question77:-The speed of an AC motor can be controlled by using
A:-SCR
B:-TRIAC
C:-DIAC with SCR
D:-DIAC with TRIAC
Correct Answer:- Option-D
Question78:-A power MOSFET is capable to handle current upto
‏۸۵ھ‎
‎B:-50A
‎C:-10A
‎D:-100 A
Correct Answer:- Option-D
Question79:-An IGBT is a hybrid form of
A:-A diode and a transistor
B:-A transistor and SCR
C:-A bipolar transistor and a MOSFET
D:-A FET and a MOSFET
Correct Answer:- Option-C
Question80:-MOSFET's are used in
A:-Inverters
B:-SMPS
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D:-All the above
Correct Answer:- Option-D
Question81:-High speed switching can be obtained using a
A:-Power IGBT
B:-PNP transistor
C:-Diode
D:-Vibrator
Correct Answer:- Option-A
Question82:-Power MOSFET and power IGBT are
A:-One and the same device
B:-Quite different devices
C:-Similar semiconductor devices
D:-Replaceable devices
Correct Answer:- Option-C
Question83:-Which one of the following semiconductor device may be used as a light sensor?
A:-Photo diode
B:-Photo transistor
C:-LDR
D:-Any one of the above
Correct Answer:- Option-D
Question84:-The material used for making optic-fibre cable in general is
A:-Copper
B:-Transparent plastic
C:-Aluminium
D:-Steel
Correct Answer:- Option-B
Question85:-Which one of the following IC contains NOT gates 7
A:-IC 7400
B:-IC 7404
C:-IC 7402
D:-IC 7408
Correct Answer:- Option-B
Question86:-Which of the following gates gives a high output with all its inputs high
A:-NOT
B:-NOR
C:-OR