Electromagnetism: Flux, Flux Density, and Flux Linkage

What is one way to quantify magnetic field strength using a current-carrying wire?

• By measuring the temperature of the wire

• By counting the number of field lines

• By calculating the force experienced by the wire

• By measuring the voltage across the wire

How are magnetic fields commonly represented in diagrams?

• As field lines from north to south

• As arrows pointing from south to north

• As dots around the magnet

• As circles around the magnet

What does flux density represent in a magnetic field?

• The temperature of the magnetic field

• The speed of the magnetic field

• The amount of flux per unit area

• The total number of field lines

Which equation represents magnetic flux in terms of magnetic field strength and area?

• Flux = B * A

• Flux = B / A

• Flux = B + A

• Flux = B - A

What additional factor is considered in the flux equation when the magnetic field is not perpendicular to the area?

• Sine of the angle

• Tangent of the angle

• Cosine of the angle

• Cotangent of the angle

What is flux linkage?

• The flux minus the number of turns

• The total flux in a single loop

• The flux times the number of turns in a coil

• The flux divided by the number of turns

What is the symbol sometimes used for flux linkage?

• Alpha

• Lambda

• Beta

• Gamma

In the demonstration with iron filings, where is the magnetic field strength the strongest?

• At the center of the magnet

• At the edges of the magnet

• Closest to the poles of the magnet

• Furthest from the poles of the magnet

What is the relationship between magnetic flux density and magnetic field strength?

• They are opposites

• They are equivalent

• They are inversely proportional

• They are unrelated

What happens to the field lines in areas of high magnetic field strength?

• They spread out

• They become more concentrated

• They change direction

• They disappear