22.1-22.4; 22.7

Which answer choice best completes the following statement:

An induced current is produced when a magnetic field is _________________.

• spinning

• changing

• increasing in magnitude

• moving

Motional emf occurs when:

• an insulator is moved through an electric field

• a conductor is moved through an electric field

• an insulator is moved through a magnetic field

• a conductor is moved through a magnetic field

A conducting rod is set up to form a complete circuit with a light bulb within a uniform magnetic field. The conducting rod is given one shove to the right then released. Which best describes the motion of the rod? (HINT: Use RHR-1)

• It will continue to move at a constant speed forever

• It will slow to a stop and not move again

• It will slow to a stop then return to its initial position

_______________________ is a measure of how much magnetic field passes through a surface. It is maximum when the field is ______________________ to the surface.

• emf; parallel

• magnetic flux; parallel

• emf; perpendicular

• magnetic flux; perpendicular

• induction (V)

• electromagnetic force / emf (N)

• electricity (V)

• electromagnetic force / emf (V)

Based on the units of ε, we know that it is interchangeable with what other symbol on the formula sheet?

• v = velocity

• V = voltage / electric potential

• R = resistance

• C = capacitance

• magnetic flux (Wb)

• magnetism (T)

• magnetic flux (T)

• magnetism (B)

What are the units of ω in the equation:

ε = NABωsin(ωt)

• degrees

• radians

• radians / second

• degrees / second