A Long Straight Cylindrical Shell Has an Inner Radius R_i

question 44

Multiple Choice

A long straight cylindrical shell has an inner radius R_i and an outer radius R_o.It carries a current i, uniformly distributed over its cross section.A wire is parallel to the cylinder axis, in the hollow region (r < R_i) .The magnetic field is zero everywhere in the hollow region.We conclude that the wire:

• A)is on the cylinder axis and carries current i in the same direction as the current in the shell
• B)may be anywhere in the hollow region but must be carrying current i in the direction opposite to that of the current in the shell
• C)may be anywhere in the hollow region but must be carrying current i in the same direction as the current in the shell
• D)is on the cylinder axis and carries current i in the direction opposite to that of the current in the shell
• E)does not carry any current

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Definitions:

Bond Angle

The angle formed between two bonds at the atom where they meet, influencing the molecule's geometry.

Dimethyl Ether

An organic compound with the formula CH3OCH3, used as an aerosol spray propellant and a refrigerant.

Boiling Point

The temperature at which a liquid turns to vapor, specific to each substance under given pressure conditions.

Diethyl Ether

A highly volatile and flammable ether used as a solvent and formerly as an anesthetic.