IndiaBIX

Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 3
11.
A capacitance transducer can be used to measure
thickness of sheet
displacement
level of fluids
all of the above
Answer: Option
Explanation:

In all these, change of capacitance occurs.

12.
The dynamometer principle can be used for
ammeter only
voltmeter only
wattmeter only
ammeter, voltmeter and wattmeter
Answer: Option
Explanation:

Dynamometer principle can be used for ammeter, voltmeter and wattmeter. However it is generally used for wattmeters only.

13.

Assertion (A): In hot wire instrument the material of hot wire in generally platinum iridium.

Reason (R): A hot wire ammeter is suitable for ac only

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:

Hot wire instruments are suitable for both ac and dc.

14.
The scale of hot wire ammeter is
linear
non-linear
cramped
absolute linear
Answer: Option
Explanation:

Since deflecting torque ∞ I2, scale is non-linear.

15.
A moving coil meter has a shunt of 0.02 Ω resistance. If coil resistance is 1000 Ω and a potential difference of 500 mV is required across it to cause full scale deflection, the current through shunt is
2.5 A
25 A
0.25 A
0.025 A
Answer: Option
Explanation:

.

Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers