Nine Identical Wires, Each of Diameter D and Length L

question 26

Multiple Choice

Nine identical wires, each of diameter d and length L, are connected in series.The combination has the same resistance as a single similar wire of length L but whose diameter is:

• A)9d
• B)3d
• C)d/3
• D)d/9
• E)d/81

---

Definitions:

Air Pollution

The presence of harmful or excessive quantities of substances, including gases, particulates, and biological molecules in the atmosphere.

Pollutants

Substances that contaminate air, water, or soil, potentially causing harm to human health, the environment, or both.

Emissions

The release of substances, such as gases, liquids, or particulates, into the air or water, often associated with pollution from industrial activities or vehicles.

Efficient Method

A process or technique that achieves a goal with minimal waste of time, resources, or energy, maximizing productivity and effectiveness.