A Wire with a Length of 150 M and a Radius

question 28

Multiple Choice

A wire with a length of 150 m and a radius of 0.15 m carries a current with a uniform current density of 2.8 *10⁷ A/m². The current is:

• A) 0.63 A²
• B) 2.0 A
• C) 5.9 A²
• D) 296 A
• E) 400 A²

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Definitions:

Immune System

The complex network of cells, tissues, and organs in an organism that works together to defend against foreign substances, pathogens, and diseases.

Voluntary Risk

The risk a person willingly takes after weighing the potential benefits and dangers, often seen in activities like investments, extreme sports, or elective medical procedures.

Hang Gliding

A recreational and competitive air sport in which a pilot flies a light and non-motorised foot-launched heavier-than-air aircraft called a hang glider.

Control Group

In experimental research, a group of subjects that does not receive the treatment being tested, serving as a benchmark to measure how the other tested groups do.