NEET Physics Current Electricity Questions Solved

PMT - 1999

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

(1) nG

(2) (n1)G

(3) Gn 

(4) G(n1)

(2) Suppose resistance R is connected in series with voltmeter as shown.

By Ohm's law

ig.R=(n1)V

R=(n1)G (where ig=VG

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