Question

Please work out on paper 16.5 A 4.7 μC point charge is held fixed at the...

Please work out on paper

16.5 A 4.7 μC point charge is held fixed at the origin. a) What is the electric potential difference between a point 20 cm from the 4.7 μC charge and a point 70 cm away from the 4.7 μC charge? b) If a 8 nC charge is released at point a, what is the change in potential energy of the 8 nC charge as it passes point b? c) If the mass of the 8 nC charge is 0.075 g, what is the speed of the 8 nC charge as it passes point b?

answers: a) ‒1.51 x 105 V b) ‒1.21 x 10‒3 J c) 5.68 m/s

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Answer #1

Electric potential due to a point charge Q at a distance r is given by

V=kQ/r

k=9×10^(9) Nm2/C2

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