Q16 of 330 Page 6

State whether a voltmeter has a high resistance or a low resistance. Give reason for your answer.

A voltage has a high resistance so that it takes a negligible current from the circuit. The term volt gives rise to the word voltage. Voltage is the other name for potential difference


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16

What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?

 16

What is the voltmeter? How is a voltmeter connected in the circuit to measure the potential difference between two points? Explain with the help of a diagram.

 17

The work done in moving a unit charge across two points in an electric circuit is a measure of:

 18

The device used for measuring potential differences is known as: