Physics Quiz

What is the force on a current-carrying wire? (Define what direction)

• The force is perpendicular to both the magnetic field and the current direction.

• The force is parallel to the magnetic field.

• The force is in the direction of the current.

• The force is opposite to the direction of the current.

Define Magnetic Flux.

• The number of magnetic field lines passing through a given area.

• The force exerted by a magnetic field.

• The potential difference in a magnetic field.

• The resistance to the flow of magnetic field lines.

Calculate the magnetic flux of a magnetic field of 5 x 10^-3 T and a cross-sectional area of 0.6 m².

• 3 x 10^-3 Wb

• 3 x 10^-2 Wb

• 3 x 10^-4 Wb

• 3 x 10^-5 Wb

How is the angle of the field to the area calculated?

• By using the dot product of the magnetic field and the area vector.

• By using the cross product of the magnetic field and the area vector.

• By measuring the angle directly with a protractor.

• By using the sine of the angle between the magnetic field and the area vector.

What is the formula for induced EMF (ε) of a conductor moving through a field?

• ε = B * l * v

• ε = B / l * v

• ε = B * l / v

• ε = B + l + v

What is the formula for magnetic flux?

• Φ = BAsinθ

• Φ = Bcosθ

• Φ = BAsinθ

• Φ = BAcosθ

Which law explains how transformers work in terms of electromagnetic induction?

• Ohm's Law

• Faraday's Law

• Coulomb's Law

• Newton's Law

What is the principle that Lenz's Law is consistent with?

• Conservation of mass

• Conservation of momentum

• Conservation of energy

• Conservation of charge

What is the unit of electromotive force (EMF)?

• Newton

• Joule

• Volt

• Ampere

Which of the following is a suggested practical to investigate electromagnetic induction?

• Conduct an experiment to measure the speed of light

• Conduct an experiment to investigate the induction of an electric current using a magnet and coil

• Conduct an experiment to measure the gravitational force

• Conduct an experiment to investigate the properties of sound waves