A Solenoid with 400 Turns Has a Radius of 0

question 15

Multiple Choice

A solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field near the center of the solenoid? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A) 16 mT
• B) 4.9 mT
• C) 15 mT
• D) 6.0 mT
• E) 9.0 mT

---

Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity of that good that consumers are willing to buy.

Market Demand Curve

A graphical representation showing the quantity of a particular good or service that consumers are willing and able to buy at various prices.

Individual Demand Curves

Graphical representations showing the relationship between the price of a good and the quantity of the good a single consumer is willing to buy at those prices.

Substitute Goods

Products or services that can replace or substitute each other in use, where an increase in the price of one leads to an increase in demand for the other.