Question

A test charge gains 10 joules of potential energy as it moves through an electric field. It starts its movement at point 1 and ends its movement at point 2. The potential difference between the two points is 4 volts. How many coulombs of charge are carried by the test charge

Answer 1

2.5 C coulombs of charge are carried by the test charge.

What is test charge?

A test charge is a charge of such a modest size that it has little impact on the field surrounding the site where it is placed. To determine the strength and direction of an electric field, a positive test charge is a unit positive charge.

U = qV

where,

U = 10 j

V = 4V

then, q = U/V

q = 10/4

q = 2.5 C

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