Measurements and Instrumentation

1

Four capacitors are in parallel. Their values are 36.3 `mu_`F, 3.85 `mu_`F, 34.002 `mu_`F and 850 `mu_`F with an uncertainty of digit in the last place. The total capacitance in significant figures is

A. 75.0 µF
B. 75.0 ± 0.1 µF
C. 75.1 ± 0.1 µF
D. 75.002 ± 0.1 µF

2

A meter having 0-1000 `mu_`A range and 1000 `Omega` resistance is required to be changed to 0-100 mA meter. The value of shunt resistance is about

A. 1 Ω
B. 10 Ω
C. 99 Ω
D. 100 Ω

3

In a ballistic galvanometer, a charge of 100 `mu_`C gives a first swing of `25^circ`. The charge required to cause first swing of `50^circ` is

A. 200 µC
B. 400 µC
C. 50 µC
D. 25 µC

4

The term 'Poisson's ratio' is connected with

A. strain gauge
B. LVDT
C. Bourden tube
D. capacitance transducer

5

While calibrating an ammeter by a dc potentiometer it is necessary to use a standard resistance.

A. True
B. False