Two Long Straight Wires Are Parallel and Carry Current in Opposite

question 22

Multiple Choice

Two long straight wires are parallel and carry current in opposite directions. The currents are 8.0 A and 12 A and the wires are separated by 0.40 cm. The magnetic field in tesla at a point midway between the wires is:

• A) 0
• B) 4.0 * 10^-4
• C) 8.0 * 10^-4
• D) 12 * 10^-4
• E) 20 * 10^-4

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Definitions:

Price Inelastic

Describes a situation where the quantity demanded or supplied of a good or service changes by a smaller percentage than the percentage change in price.

Cross Elasticity

A measure of how the quantity demanded of one good responds to a change in the price of another good.

Substitute Goods

Products or services that can be used in place of each other. When the price of one falls, the demand for the other product falls; conversely, when the price of one product rises, the demand for the other product rises.

Cross Elasticity

A measure of how the quantity demanded of one good responds to a change in the price of another good, indicating the degree of substitutability or complementarity between them.