(c25p59_6e) Suppose that the negative charge in a copper one-cent coin were remo
ID: 1329455 • Letter: #
Question
(c25p59_6e) Suppose that the negative charge in a copper one-cent coin were removed to a very large distance from Earth-perhaps to a distant galaxy-and that the positive charge were distributed uniformly over Earth's surface. By how much would the electric potential at the surface change? (See Sample Problem 22-7 in the problem supplement. By taking the mass of a penny to be 3.11 g, the positive or negative charge is found to be 1.37×105C)Tries 0/10 (c25p59_6e) Suppose that the negative charge in a copper one-cent coin were removed to a very large distance from Earth-perhaps to a distant galaxy-and that the positive charge were distributed uniformly over Earth's surface. By how much would the electric potential at the surface change? (See Sample Problem 22-7 in the problem supplement. By taking the mass of a penny to be 3.11 g, the positive or negative charge is found to be 1.37×105C)
Tries 0/10 Tries 0/10
Explanation / Answer
Electric potential due to point charge is
V=kq/r
where 'q' is the charge in coloumbs and 'k' is coloumb constant
we know that radius of earth is r =6400 km
by substitute above values we get
V=(9*10^9)(-1.37*10^5)/(6400*10^3)
=-1.93*10^8 V
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.