A ___________ is used to measure the potential difference.

A voltmeter is used to measure the potential difference V across XY in the circuit in Figure below . In order to give an accurate reading V , how should the resistance of the voltmeter compare with R ?

True or False. Ammeter is used to measure the potential difference in the circuit.

What is the SI unit of potential difference ? Name the device used to measure the potential difference.

What is the SI unit of potential difference ? Name the device used to measure the 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 ?

Two resistances of 400 ohm and 800 ohm are connected in series with 6 volt battery of negligible internal resistance. A voltmeter of resistance 10,000ohm is used to measure the potential difference across 400 ohm. The error in the measurement of potential difference in volt approximately .

Two resistors, 400 Omega, " and "800 Omega are connected in series with a 6 battery. It is desired to measure the current in the circuit. An ammeter of 10 Omega resistance is used for this purpose. The reading of ammeter will be N/(1210) A. Similarly, if a voltmeter of 1000 Omega resistance is used to measure the potential difference across the 400 Omega resistor, the reading of voltmeter is P/19V . Then the value of N and P are: