Electronics and Communication Engineering - Measurements and Instrumentation

1. 

The Y plates of a CRO are excited by a voltage 2 sin 100 t and the X plates are not connected. The display would be

A. a vertical line
B. a horizontal line
C. sine wave
D. slant line

Answer: Option A

Explanation:

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2. 

Heating effect of current is used in

A. ammeters
B. voltmeters
C. both ammeters and voltmeters
D. wattmeters

Answer: Option C

Explanation:

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3. 

The coils of Drysdale polar potentiometer are wound non-inductively.

A. True
B. False

Answer: Option A

Explanation:

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4. 

In figure the output V0 is

A. 2V1 + V2 - 2V3
B. 2(V1 + V2) - V3
C. V1 + V2 + V3
D. V1 + 2V2 - V3

Answer: Option A

Explanation:

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5. 

Magnetic effect of current is used in

A. ammeters
B. voltmeters
C. wattmeters
D. ammeters, voltmeters, wattmeters and energy meters

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

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