A Wire Is Bent into the Shape of a Circle

question 32

Multiple Choice

A wire is bent into the shape of a circle of radius r = 0.10 m and carries a 20.0-A current in the direction shown.
-What is the magnitude of the magnetic field at the center of the loop?

• A)2.0 × 10^-5 T
• B)1.3 × 10^-5 T
• C)2.0 × 10^-4 T
• D)1.3 × 10^-4 T
• E)zero tesla

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Economic Value

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Interest

The cost of borrowing money or the return on investments, usually expressed as a percentage of the amount lent, deposited, or invested.

Interest

A monetary charge for the concession to borrow currency, habitually framed as an annual percentage figure.

Television

An electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound.