When a Potential Difference Is Applied Across a Piece of Wire

question 69

Multiple Choice

When a potential difference is applied across a piece of wire made of metal A, a $5.0 - m A$ current flows. If the metal-A wire is replaced with a wire made of metal B having twice the diameter of the metal-A wire, how much current will flow through the metal-B wire? The lengths of both wires are the same, and the voltage difference remains unchanged. The resistivity of metal A is 1.68 × 10^-8 Ω ∙ m, and the resistivity of metal B is 1.59 × 10^-8 Ω ∙ m.

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

---

Definitions:

Video Conference Interview

An interview conducted remotely using video communication software, allowing participants to see and speak with each other in real-time over the internet.

Risk-Taking

The willingness to engage in behaviors or decisions that entail potential losses or failure in pursuit of potential gains.

Electronic Communication

The transmission of information using electronic media such as email, text messaging, and social networking sites.

Risk-Seeking

A tendency to pursue opportunities with potentially high rewards despite the associated high risks.