Class test 5: 5.8.2020

Class test 5: 5.8.2020

University

10 Qs

quiz-placeholder

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Class test 5: 5.8.2020

Class test 5: 5.8.2020

Assessment

Quiz

Education

University

Medium

Created by

Kalpanadevi S

Used 3+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

LASING action depends on

Spontaneous emission

Stimulated emission

Spontaneous emission followed by stimulated emissions

Absorption of radiation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Semiconductor materials produces light

Silicon

Gallium

Germanium

None of the above

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Combination of semiconductors that emits blue colour in LED

Gallium Arsenide

Gallium Nitrite

Gallium Arsenide and Phosphide

Gallium Phosphide

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

In a LED light output is directly proportional to the ---------------------------------

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The switching speed of LEDs is in terms of

1nsec

1msec

1microsec

1sec

6.

FILL IN THE BLANK QUESTION

1 min • 1 pt

To turn on the LED in common anode type 7 segment display, LED is to be connected to Supply or to Ground?

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a laser diodes emits light in a direction parallel to the PV junction plane then laser diode is called

Edge – emitting LASER diode

Surface Emitting LASER diodes

Plane Emitting LASER diode

Diagonal emitting LASER diode

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