An isolated, irregularly shaped piece of platinum carries -7.15 x10° C of charge

Question

An isolated, irregularly shaped piece of platinum carries -7.15 x10° 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): O may equal V. O equals V O always differs from V. cliten to oi ic the's ureng hdi sate onroint on the body's surface has the value E,the field strength at a O equals 0. O always differs fromE O may equal E O equals E Calculate the potential at a distance of 6.29 m from the center of the charged piece of platinum. Number

Explanation / Answer

Since the distance is very large in comparison to size

Potential = kQ/d

= 9E9x(-7.15E-9)/6.29

=10.23 V

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