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Electronics and Communication Engineering - Electronic Devices and Circuits

Exercise : Electronic Devices and Circuits - Section 8
46.
The advantage of LVDT over inductive bridge type transducer is that
it gives high output for small changes in core position
it can be used over a temperature range of - 265°C to 600°C
it can measure displacement of moving object
the error due to stray magnetic field is less
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
In a Weston synchronoscope the deflecting torque is zero when
currents in fixed and moving coils are in phase
currents in fixed and moving coils are out of phase by 90°
currents in fixed and moving coils are out of phase by 60°
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.

Assertion (A): Megger is used to check insulation resistance of cables.

Reason (R): Insulation resistance of cables is very high.

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.
49.

Assertion (A): A power factor meter operates on dynamometer principle.

Reason (R): A power factor meter does not have a control spring.

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.
50.

Assertion (A): A radiation pyrometer is very suitable for high temperature measurement.

Reason (R): When temperature is high, a physical contact between hot body and thermometer is not desirable.

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.
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