A moving coil voltmeter is generally used to measure the potential difference across a conductor of resistance `'r'` carrying a current `i`. The resistance of voltmeter is `R`. For more correct measurement of potential difference

A voltmeter of resistance R is to be used to measure the potential difference across a resistance r . The nearest reading in the absence of voltmeter ?

For the measurement of potential difference, voltmeter is connected

For the measurement of potential difference, voltmeter is connected

How is a voltmeter connected in the circuit to measure the potential difference between two points?

A voltmeter of resistances 400(Omega) is used to measure the potential difference across the 100(Omega) resistor in the circuit shown in figure.(a) What will be the reading of the voltmeter ?(b) What was the potential difference across 100(Omega) before the voltmeter was connected ?