Magnetic Fields and Optics Quiz

What is the SI unit of magnetic fields?

• A. Newton

• D. Volt

• B. Tesla

• C. Ampere

What does a magnetic field do?

• B. Exerts force on magnetic materials

• C. Exerts force on all materials

• A. Exerts force on electric charges

• D. Exerts no force

Who discovered that electricity and magnetism are related?

• D. James Clerk Maxwell

• C. André-Marie Ampère

• B. Hans Christian Ørsted

• A. Michael Faraday

What does Faraday's Law state?

• A. A changing magnetic field induces an electric current

• D. Electric fields are independent of magnetic fields

• B. Electric current creates a magnetic field

• C. Magnetic fields do not affect electric currents

What is the effect of increasing the number of loops in a coil?

• C. No effect on EMF

• D. Decreased current flow

• B. Increased total EMF

• A. Decreased total EMF

What is the primary function of an inductor in a circuit?

• D. To increase current flow

• A. To store energy as electric energy

• B. To store energy as magnetic energy

• C. To convert energy to heat

What is the charge of a proton?

• A. 1.6 x 10^-19 C

• B. -1.6 x 10^-19 C

• C. 0 C

• D. 9.1 x 10^-31 C

What is the relationship between the angle of incidence and the angle of reflection?

• A. They are always equal

• C. They are independent of each other

• B. They are always different

• D. They depend on the medium

What type of lens is thicker at the edges than at the middle?

• A. Convex lens

• B. Concave lens

• C. Spherical lens

• D. Cylindrical lens

What is the formula for the index of refraction?

• A. n = c/v

• D. n = v + c

• B. n = v/c

• C. n = c * v