| 1 |
The gain of transistor amplifier depends upon |
Resistance connected with collector
Resistance connected with base voltage
Input voltage
Output voltage
|
| 2 |
A device which converts low voltage or current to high voltage or current is called. |
Transformer
AC generator
Amplifier
Rectifier
|
| 3 |
The sensor of light is. |
Transistor
LED
Diode
Light dependent resistance
|
| 4 |
Doping is made comparatively larger in |
Emitter
Base
Collector
P -type semi conductor
|
| 5 |
Which component of the transistor has greater contrition of impurity. |
Base
Emitter
Collector
Emitter and collector
|
| 6 |
The central region of a transistor is called. |
Emitter
Collector
Base
Neutral
|
| 7 |
Transistors are made from |
Plastics
Metals
Insulator
Doped semi conductors
|
| 8 |
Transistor was discovered by |
Young
Curie
John Bardeen
Shale's
|
| 9 |
The ratio Beta in transistor is called. |
Voltage gain
Emitter gain
Current gain
Nuclear gain
|
| 10 |
Photo diode detects. |
Visible light
Radio waves
X rays
All of them
|
| 11 |
A photo diode can turn its current ON and OFF in |
Micro seconds
Mega seconds
Nano seconds
Mili seconds
|
| 12 |
Which diode works at reverse biasing. |
LED
Photo voltaic cell
Photo diode
Silicon diode
|
| 13 |
the number of terminals in a semiconductor diode are |
2
3
4
5
|
| 14 |
Photo diode is used for detection of. |
Heat
Magnet
Current
Light
|
| 15 |
The colour of light emitted by a LED depends on. |
It forward biased
Its reverse biased
Unbiased
None of these
|
| 16 |
A light emitting diode emits light only when |
Reverse biased
Forward biased
Unbiased
None of these
|
| 17 |
Light emitting diodes are made from semiconductors. |
Silicon
Germanium
Carbon
Gallium arsenide
|
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