Chapter 4 Quiz on Magnetic Flux

What is the unit of magnetic flux?

• Tesla (T)

• Weber (Wb)

• Ampere (A)

• Volt (V)

Magnetic flux (ΦB) through a closed loop depends on which of the following factors?

• Strength of the magnetic field (B)

• Area of the loop (A)

• Angle between the magnetic field and the area vector (θ)

• All of the above

According to Faraday's law of induction, what is the relationship between induced electromotive force (emf) and the rate of change of magnetic flux?

• ε = ΔΦB/Δt

• ε = -ΔΦB/Δt

• ε = Δt/ΔΦB

• ε = -Δt/ΔΦB

If the angle (θ) between the magnetic field and the area vector is 0 degrees, what is the value of cos(θ)?

• 0

• 0.5

• 1

• Undefined

What happens to the current induced in a loop when a magnet is moved towards it?

• It increases

• It decreases

• It remains constant

• It stops

What will occur if a magnet is held stationary inside a wire loop?

• Current will increase

• Current will decrease

• No current will be induced

• Current will reverse direction

How does the speed of the magnet's movement affect the induced current?

• It has no effect by increasing the speed.

• Induced current decreases by increasing the speed.

• Induced current increases by increasing the speed.

• Induced current oscillates by increasing the speed.

Which factor does NOT affect the amount of induced current in a loop according to Faraday's law?

• The strength of the magnetic field

• The area of the loop

• The color of the wire

• The number of turns in the loop

When a magnet is moved away from a loop, what happens to the induced current?

• It remains the same

• It flows in the same direction as when the magnet was approached

• It flows in the opposite direction

• It completely stops

What is the primary factor affecting the magnetic flux density (B) in a given area?

• The temperature of the environment

• The strength of the magnetic field

• The resistance of the wire

• The type of material in the loop