A potential difference of 220 V is applied across a rheostat of 12000 ohm. The voltmeter V has a resistance of 6000 ohm and point C is at one fourth of the distance from A to B. The error in the reading of voltmeter is approximately -
Text Solution
Verified by ExpertsThe correct answer is:
A
It total voltage across AB is 220 then voltage across CB should be 
= 54 volts (voltage to be measured)
⎯→ 
⎯→ 
V' = 
= 40 V (voltage being measured)
∴ % error = 
× 100 = 
× 100 = 26%
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