Current Electricity Charging Discharging Of Capacitors Question 216
Question: 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
[MP PMT 1999; MP PET 2002; DPMT 2004; MH CET 2004]
Options:
A) nG
B) $ (n-1)G $
C) $ \frac{G}{n} $
D) $ \frac{G}{(n-1)} $
Show Answer
Answer:
Correct Answer: B
Solution:
Suppose resistance R is connected in series with voltmeter as shown. By Ohm’s law $ i _{g}.R=(n-1)V $
Therefore $ R=(n-1)G $ (where $ i _{g}=\frac{V}{G}) $
BETA
