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Question

Match the following:

List I List II

A. Laser 1. Emits monochromatic light of low intensity

B. Solar cell 2. Consumes electrical power due to incident light

C. Photodiode 3. Delivers power to a load

D. LED 4. Emits monochromatic light of high intensity

Options
A. A-4, B-3, C-1, D-2
B. A-3, B-4, C-2, D-1
C. A-4, B-3, C-2, D-1
D. A-3, B-4, C-1, D-2

Correct Answer

A-4, B-3, C-2, D-1

More questions

1. The path length between ports 1 and 2 for the two waves in a hybrid ring is
Options
A. 1
B.
C.
D.

2. Match the following:

	List I		List II
A.	DMA controller	1.	Interface between computer and video display adapter
B.	CKT controller	2.	Used to read data directly from disk into directly memory
C.	Interrupt controller	3.	Supervises the operation of control signal

Options
A. A-1, B-2, C-3
B. A-2, B-3, C-1
C. A-3, B-2, C-1
D. A-2, B-1, C-3

3. In the circuit of figure the voltage across capacitor when switch is closed at t = ? is
Options
A. 0 V
B. 20 V
C. very large
D. 7.5 V

4. While selecting a memory chip the feature which should be examined is
Options
A. capacity
B. ac characteristics
C. dc characteristics
D. all of the above

6. Match the following:

	List I		List II
A.	Horn antenna	1.	High directivity
B.	Parabolic antenna	2.	Very high directivity
C.	Lens antenna	3.	Moderate directivity

Options
A. A-1, B-2, C-3
B. A-3, B-2, C-1
C. A-3, B-1, C-2
D. A-1, B-3, C-2

7. Assertion (A): A TRIAC is a bidirectional SCR.
Reason (R): A TRIAC is a four layers 3 terminal device and can conduct in both directions.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

8. A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is
Options
A. 7 mA
B. 6.3 mA
C. 0.7 mA
D. 0

9. Assertion (A): The turn on time of SCR is about 1 to 4 ms.
Reason (R): The turn off time of SCR is about 10 to 300 ms.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

10. A carry look ahead adder is frequently used for addition because
Options
A. it costs less
B. it is faster
C. it is more accurate
D. is uses fewer gates

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