A D.C supply of 120 V is connected to a large resistance X. A voltmeter of resistance 10 k Ω Ω placed in series in circuit reads 4V. This is an unusual use of voltmeter for measuring very high resistance. The value of X is -
Text Solution
Verified by ExpertsThe correct answer is:
B
i = 
Reading of voltmeter = 
× 10
= 4
X = 290 K Ω Ω
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