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A voltmeter has a resistance of G ohm and range V volt. The value of resistance used in series to convert it into a voltmeter of range  volt is

a)

b)

c)

d)



Question ID - 150245 | SaraNextGen Top Answer

A voltmeter has a resistance of G ohm and range V volt. The value of resistance used in series to convert it into a voltmeter of range  volt is

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

Voltmeter is an instrument which measure the potential difference between two points. A high resistance is connected in series with coil of the galvanometer to convert it into voltmeter. This resistance is either 2000  or more than that.

Resistance connected in series is given by

Eq. (i) is the value of the resistance required to convert the galvanometer to voltmeter of range 0 to V.

From the relation

Hence,  

127 votes


127