When a Voltage Difference Is Applied to a Piece of Metal

question 10

Multiple Choice

When a voltage difference is applied to a piece of metal wire, a current flows through it. If this metal wire is now replaced with a silver wire having twice the diameter of the original wire, how much current will flow through the silver wire? The lengths of both wires are the same, and the voltage difference remains unchanged. (The resistivity of the original metal is 1.68 × 10^-8 Ω ∙ m, and the resistivity of silver is 1.59 × 10^-8 Ω ∙ m.)

• A) 21 mA
• B) 19 mA
• C) 11 mA
• D) 5.3 mA

Learn the use of nonverbal communication techniques in sales.

Appreciate the role of customer participation and sensory appeal in sales presentations.

Recognize the value of testimonials and expert opinions in enhancing product credibility.

Identify strategies for handling objections and challenges during sales presentations.

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