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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 8
26.
In low power factor wattmeter, the pressure coil is connected
to the supply side of current coil
to the load side of current coil
in either (a) or (b)
across the mains
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Figure shows the equivalent circuit of resistor. The resistor is non-inductive when
R = L/C
LR = L/C
L = CR2
C = LR2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The signal to noise ratio in telemetry should be better than
5 db
10 db
25 db
60 db
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.

Assertion (A): Electrodynamic instrument is not used as ammeter or voltmeter.

Reason (R): Electrodynamic instrument is more costly than PMMC and moving iron instrument.

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.
30.
Consider the following statements regarding electro-dynamometer type indicating instrument
It can be used for measuring
  1. Direct current
  2. Alternating current
  3. Direct voltage
  4. Alternating voltage
Of these statements
1 and 2 are corect
3 and 4 are correct
1 and 3 are correct
1, 2, 3, 4 are correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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