If the negative potential on the control grid of CRT is increased, the intensity of spot _____________?

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 CRO is used to measure _________________?

A. Voltage

B. Frequency

C. Phase

D. All of above

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

The resistance of an ideal voltmeter is ______________?

A. Low

B. Infinite

C. Zero

D. High