A Wire of Resistivity ρ Must Be Replaced in a Circuit

question 48

Multiple Choice

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but 4 times as long.If,however,the resistance of the new wire is to be the same as the resistance of the original wire,the diameter of the new wire must be

• A) the same as the diameter of the original wire.
• B) 1/2 the diameter of the original wire.
• C) 1/4 the diameter of the original wire.
• D) 2 times the diameter of the original wire.
• E) 4 times the diameter of the original wire.

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Definitions:

IOU

An informal document that acknowledges a debt owed by one party to another, but not necessarily specifying repayment terms.

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An act by which a debtor recognizes their debt and reaffirms their obligation to pay it, often to prevent the statute of limitations from expiring.

Negotiability

The characteristic of a document (such as a check or note) signifying that it can be transferred from one person to another in a manner that the recipient takes it free of most defenses that could be raised by the original maker or drawer.

Agent's Signature

The signature of a person who is authorized to act on behalf of another, indicating consent or agreement in a contractual context.