Current Electricity 5 Question 3
3. The actual value of resistance , shown in the figure is . This is measured in an experiment as shown using the standard formula , where and are the readings of the voltmeter and ammeter, respectively. If the measured value of is less, then the internal resistance of the voltmeter is
(2019 Main, 10 Jan II))
(a)
(b)
(c)
(d)
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Solution:
- Measured value of
less than actual value of .
Actual values of
So, measured value of
Now, let us assume that internal resistance of voltmeter
It is clear that the measured value,