At a Certain Point and a Certain Time the Electric

question 56

Multiple Choice

At a certain point and a certain time the electric field of an electromagnetic wave is in the negative z direction and the magnetic field is in the positive y direction. Which of the following statements is true?

• A) Energy is being transported in the positive x direction but half a cycle later, when the electric field is in the opposite direction, it will be transported in the negative x direction
• B) Energy is being transported in the positive x direction and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the positive x direction
• C) Energy is being transported in the negative x direction but half a cycle later, when the electric field is in the opposite direction, it will be transported in the positive x direction
• D) Energy is being transported in the negative x direction and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the negative x direction.
• E) None of the above are true.

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Definitions:

Equilibrium Price

The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers, establishing market balance.

Equilibrium Quantity

The level of goods or services supplied matches the consumer demand at the price which establishes market equilibrium.

Preset Price

refers to a price that is established in advance and does not change in response to market conditions or negotiation.

Price Ceiling

A legal maximum price set by the government on certain goods and services to prevent prices from becoming too high.