When a Potential Difference Is Applied Across a Piece of Wire

question 191

Multiple Choice

When a potential difference is applied across a piece of wire made of metal A,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:

Check References

The process of verifying the qualifications, experience, and suitability of job applicants by contacting their provided references.

Department Manager

A role within an organization responsible for managing the operations, staff, and budget of a department.

Applicants

Individuals who apply or show interest in a job position or educational program.

Recruit Externally

The process of hiring employees from outside the organization rather than promoting from within.