Electromagnetism and Light Assessment

What is the unit of electric charge?

• Volt

• Ampere

• Coulomb

• Ohm

Electromagnetic waves consist of oscillating:

• Sound waves and light waves

• Electric and magnetic fields

• Protons and electrons

• Positive and negative charges

Which color of visible light has the longest wavelength?

• Blue

• Green

• Yellow

• Red

The force between two electric charges is described by:

• Newton's Law

• Ohm's Law

• Coulomb's Law

• Faraday's Law

What happens to light speed when it enters glass from air?

• Increases

• Decreases

• Remains the same

• Becomes zero

In an electromagnetic wave, the electric and magnetic fields are:

• Parallel to each other

• Perpendicular to each other

• Moving in opposite directions

• Moving at different speeds

The SI unit for magnetic field strength is the:

• Weber

• Tesla

• Henry

• Gauss

Which electromagnetic wave has the highest frequency?

• Radio waves

• Visible light

• X-rays

• Gamma rays

According to Ohm's Law, voltage equals:

• Current divided by resistance

• Current times resistance

• Resistance divided by current

• Power times current

What causes refraction of light?

• Change in wave amplitude

• Change in wave frequency

• Change in wave speed

• Change in wave direction only