For display of signal pattern _____________voltage is applied to the horizontal plates of a CRO?
(A) Sinusoidal
(B) Rectangular
(C) Sawtooth
(D) None of the above
A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ______________?
(A) GS/(G+S)
(B) G+S
(C) G-S
(D) None of the above
The sensitivity of a voltmeter which uses a 100 µA meter movement is ____________?
(A) 1 kO/V
(B) 10 kO/V
(C) 5 kO/V
(D) Data insufficient
The materil used to coat inside the face of CRT is ______________?
(A) Carbon
(B) Sulphur
(C) Silicon
(D) Phosphorous
The most accurate device for measuring voltage is ____________?
(A) Voltmeter
(B) Multimeter
(C) CRO
(D) VTVM
An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?
(A) nG
(B) (n-1)G
(C) G/(n-1)
(D) G/n
A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?
(A) nG
(B) G/n
(C) G/(n-1)
(D) (n-1)G
Which of the following is likely to have the largest resistance ?
(A) Voltmeter of range 10 V
(B) Moving coil galvanometer
(C) Ammeter of range 1 A
(D) A copper wire of length 1 m and diameter 3 mm