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Phys2ProbSet3a

# Phys2ProbSet3a - PHYSIC-2 PROBLEMSET-3[ELECTRIC POTENTIAL 1...

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PHYSIC-2 PROBLEMSET-3[ELECTRIC POTENTIAL] 1. In a given lightning flash, the potential difference between the ground and a cloud is 1.0 × 10 9 V and the quantity of charge transfer is 30 C. (a) what is the decrease in energy of that transferred charge? (b) If all that energy could be used to accelerate a 1000 kg automobile from rest, what would be the automobile’s final speed? If the energy could be used to melt ice, how much ice would it melt at 0 0 C? The heat of fusion of ice is 3.33 × 10 5 J/kg. 2. Consider a point charge q = 1.0 μ C, point A at distance d 1 = 2.0 m from q, and point B at distance d 2 = 1.0 m. (a) If these points are diametrically opposite to each other as in the adjacent figure, what is the electric potential difference V A - V B ? (b) What is the electric potential difference if the points A and B are located as in fig 2b? 3. In Fig 3, set V = 0 at infinity and let the particles have charges q 1 = +q and q 2 = -3q. Then locate (in terms of the separation d) any point

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