High Frequency Alternating Current Is Passed Through a Solenoid That

question 40

Multiple Choice

High frequency alternating current is passed through a solenoid that contains a solid copper core insulated from the coils of the solenoid. Which statement is correct?

• A) A copper core remains cool no matter what the frequency of the current in the solenoid is.
• B) The copper core remains cool because the induced emf is parallel to the solenoid axis and fluctuates rapidly.
• C) The copper core heats up because an emf parallel to the solenoid axis is induced in the core.
• D) The copper core heats up because circular currents around its axis are induced in the core.
• E) The copper core heats up because the electric field induced in the copper is parallel to the magnetic field produced by the solenoid.

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Definitions:

Escapism

The practice of seeking distraction and relief from unpleasant realities, especially by engaging in entertainment or fantasy.

World System Theory

A multidisciplinary, macro-scale approach to world history and social change that suggests there is a world economic system in which some countries benefit while others are exploited.

Peripheral Country

A term used in world-systems theory to describe countries that are less developed economically and are often exploited by more developed core countries through trade and labor.

Core Country

Nations that are economically developed with a high standard of living and significant influence on global economic and political decisions.