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10th Class General Science Unit 11 Science Technology and Development English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Which of the following is an input device:
Choose an answer
key board
printer
monitor
CPU
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Question # 2
In P-type semi -conductior, most of the current is due to.
Choose an answer
Free electron
Holes
Positive ions
Heat
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Question # 3
In Pure -semi conductors no free electrons are available to conduct electric current at.
Choose an answer
Ordinary temperature
Low temperature
High temperature
None of these
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Question # 4
in binary system. 37 is written as.
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101101
100101
110011
101011
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Question # 5
Electric signal is converted into digital signal by.
Choose an answer
Key board
Monitor
Scanner
Modem
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Question # 6
Which of the following are electromagnetic waves:
Choose an answer
sound
water waves
Ultrasound
light
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Question # 7
Who was the inventor of radio system.
Choose an answer
Grahm bell
F. Crick
Charles babbage
Marconi
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Question # 8
Purose of electron gun in TV is to.
Choose an answer
Fire electron
Receive electron
Consume electron
Display picture
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Question # 9
The examples of semi - conductors:
Choose an answer
sodium and potassium
calcium and potassium
Germanium and silicon
carbon and nitrogen
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Question # 10
The substances through which current con not pass are called:
Choose an answer
Semi - conductors
Insulators
conductors
non - metal
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Question # 11
The deficiency of elctrons in outermost shell of silicon atom is called.
Choose an answer
Valent shell hole
Doping
Hole
None of these
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Question # 12
Hovering satellite completes its rotation in 24 hours at the height of:
Choose an answer
360 km
3600 km
36000 km
360000 km
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Question # 13
The frequency of the carrier waver used of radio transmission:
Choose an answer
30 KHZ
40 KHZ
50 KHZ
60 KHZ
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Question # 14
Word"Computer" is derive from.
Choose an answer
Machine
Calculator
Compute
All of these
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Question # 15
Revolutionary charges have occur in last ............. years.
Choose an answer
30
40
50
60
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