Current Electricity Charging Discharging Of Capacitors Question 743
Question: A potential difference of 220 V is maintained across a 12000 ohm rheostat, as shown in the figure. The voltmeter has a resistance of 6000 ohm and point c is at one-fourth of the distance from a to b,
Therefore, the reading of the voltmeter will be
Options:
A) 32 V
B) 36 V
C) 40 V
D) 42 V
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ ( \frac{I}{4}\times 12000 )/6000=2000, $
$ I=\frac{220}{9000+12000}A $
$ \
Therefore $ Potential difference across voltmeter = 40 V.
BETA
