The use of _________ instruments is merely confined within laboratories as standardizing instruments?
(A) absolute
(B) indicating
(C) recording
(D) integrating
(D) none of the above
The household energy meter is_______________?
(A) an indicating instrument
(B) a recording instrument
(C) an integrating instrument
(D) none of the above
An ammeter is a______________?
(A) secondary instrument
(B) absolute instrument
(C) recording instrument
(D) integrating instrument
Which of the following meters are not used on D.C. circuits______________?
(A) Mercury motor meters
(B) Commutator motor meters
(C) Induction meters
(D) None of the above
In a portable instrument, the controlling torque is provided by_____________?
(A) spring
(B) gravity
(C) eddy currents
(D) all of the above
In majority of instruments damping is provided by______________?
(A) fluid friction
(B) spring
(C) eddy currents
(D) all of the above
The disc of an instrument using eddy current damping should be of________________?
(A) conducting and magnetic material
(B) non-conducting and magnetic material
(C) conducting and non-magnetic material
(D) none of the above
The function of shunt in an ammeter is to______________?
(A) by pass the current
(B) increase the sensitivity of the ammeter
(C) increase the resistance of ammeter
(D) none of the above
A potentiometer may be used for_________________?
(A) measurement of resistance
(B) measurement of current
(C) calibration of ammeter
(D) calibration of voltmeter
(D) all of the above
In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?
(A) as long as possible
(B) as short as possible
(C) neither too small not too large
(D) very thick