IndiaBIX

Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 5
16.

Assertion (A): The scale a PMMC ammeter is linear.

Reason (R): The deflecting torque of PMMC is proportional to current in the coil.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:

Since the deflecting torque is proportional to current, the scale is linear.

17.

Assertion (A): Moving iron instrument can be used on ac or dc.

Reason (R): In a moving iron instrument deflecting torque is proportional to square of current.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
A land line telemetry system is suitable for distance upto
about 1 km only
about 10 km only
about 100 km only
any of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Use of high permeability core in moving iron instrument helps in
reducing size of meter
increasing sensitivity
reducing temperature error
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The resistance of series field winding is a low resistance.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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