| 1 |
Radioactivity occurs naturally from all the elecments with atomic number greater than. |
62
72
80
82
|
| 2 |
Frequency of ultrasound is. |
Less than 20 Hz
20 KHz
30 KHz
More than 20 khn
|
| 3 |
Emission of ratiations from nucleus is said to be |
Chemical reaction
Atomic reaction
Radioactivity
Nuclear fission
|
| 4 |
Which disk consisting of metal plates for recording. |
Floopy
RAM
HARD
CD
|
| 5 |
Word FAX is short form of. |
Facsiline
Facsimile
Fasimile
None of these
|
| 6 |
The numebr (100)16 in decimal is equal to............. in binary. |
1110100
01011101
1100100
<u>1001001</u>
|
| 7 |
the number of (101)10 in decimal is equal to .......... inbinary. |
0101111
0000101
10101101
1100101
|
| 8 |
Operation " 2+3" in computer performed by. |
CU
CPU
ALU
None of these
|
| 9 |
Word"Computer" is derive from. |
Machine
Calculator
Compute
All of these
|
| 10 |
Purose of electron gun in TV is to. |
Fire electron
Receive electron
Consume electron
Display picture
|
| 11 |
Who was the inventor of radio system. |
Grahm bell
F. Crick
Charles babbage
Marconi
|
| 12 |
English word "9" has been divided into ............ segments. |
5
6
7
8
|
| 13 |
The current flow from p-type semi conductors is due to. |
Free electrons
Valance electrons
Doping
Hole
|
| 14 |
The deficiency of elctrons in outermost shell of silicon atom is called. |
Valent shell hole
Doping
Hole
None of these
|
| 15 |
In Pure -semi conductors no free electrons are available to conduct electric current at. |
Ordinary temperature
Low temperature
High temperature
None of these
|
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