An isolated, irregularly shaped piece of platinum carries -7.81 × 10-9 C of char

Question

An isolated, irregularly shaped piece of platinum carries -7.81 × 10-9 C of charge and is in electric equilibrium. The size of this body is about 4 mm. When the electric potential at some point on the metal's surface has the value V, the potential at a different point on the surface (indicate one):

a)always differ from V

b) equals V

c) may equal V

When the electric field strength at some point on the body's surface has the value E, the field strength at a different point on the surface (indicate one):

a)may equal E.

b)always differs from E.

c)equals E

d)equals 0

Calculate the potential at a distance of 6.61 m from the center of the charged piece of platinum.

Explanation / Answer

c) may equal V

a) may equal E


V= KQ/r = -10.622 Volt

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