At a Certain Point and a Certain Time the Electric

question 38

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 is true.

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Definitions:

Need for Competence

An individual's inherent desire to effectively interact with their environment, demonstrating skillfulness and mastery in their tasks or activities.

Need for Power

A psychological trait described by David McClelland as the desire to influence, teach, or encourage others to achieve.

Need for Affiliation

The desire to form connections with others and be part of a group or community.

Need for Competence

An individual's intrinsic desire to be effective in dealing with the environment and to master complex tasks.