An isolated, irregularly shaped piece of platinum carries -8.89 × 10-9 C of char

Question

An isolated, irregularly shaped piece of platinum carries -8.89 × 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) May equal V

b) always differs from V.

c) equals 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) equals E

c) Equals 0

d) always differs from E

Calculate the potential at a distance of 5.53 m from the center of the charged piece of platinum.

answer___________________V

Explanation / Answer

here,

the potential at a different point on the surface is c) equals V

the field strength at a different point on the surface is a)May equal E

distance , d = 5.53 m

charge at the centre , q = -8.89 * 10^-9 C

the potential at a distance of 5.53 m from the center, V = k * q/r

V = 9 * 10^9 * (-8.89 * 10^-9) / 5.53

V = - 14.47 V

the potential at a distance of 5.53 m from the center of the charged piece of platinum is - 14.47 V

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