A Wire in the Shape of an "M" Lies in the Plane

question 48

Multiple Choice

A wire in the shape of an "M" lies in the plane of the paper. It carries a current of $2.0 \mathrm {~A}$ , flowing from $A$ to $E$ , as shown in the figure. It is placed in a uniform magnetic field of $0.55 \mathrm {~T}$ in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that $A B$ is parallel to $D E$ and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section CD of this wire?

• A) \(0.40 \mathrm {~N}\) perpendicular out of the page
• B) \(0.40 \mathrm {~N}\) perpendicular into the page
• C) \(0.066 \mathrm {~N}\) perpendicular into the page
• D) \(0.066 \mathrm {~N}\) perpendicular out of the page
• E) \(0.20 \mathrm {~N}\) perpendicular out of the page

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Definitions:

Market Rate

The current price or cost of goods, services, or financial assets in a competitive marketplace, often subject to fluctuations.

Net Present Value

A method used in capital budgeting to evaluate the profitability of an investment, accounting for the time value of money.

Payback

A capital budgeting method that calculates the time needed to recoup the cost of an investment, based on its expected cash flows.

Market Rate

The current price at which an asset or service can be bought or sold in the marketplace.