A Hollow Conducting Spherical Shell Has Radii of 0

question 7

Multiple Choice

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m,as shown in the figure.The sphere carries a net excess charge of -500 nC.A point charge of +300 nC is present at the center.
(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C) The radial component of the electric field at a point that is 1.50 m from the center is closest to

• A) +1200 N/C.
• B) +2000 N/C.
• C) -800 N/C.
• D) -1600 N/C.
• E) -2000 N/C.

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Definitions:

Double-Declining-Balance Rate

A method of accelerated depreciation that applies a constant rate, which is double the straight-line rate, to the declining book value of an asset each year.

Straight-Line Rate

A method of calculating depreciation of an asset, dividing its cost by the number of years in its useful life.

Depreciation Expense

The structured spreading of the expense associated with a tangible asset across its useful life.

Double Declining-Balance Method

An accelerated depreciation method that computes an asset's depreciation at double the rate of the straight-line method over its useful life.