According to the photoelectric effect, the kinetic energy of each electron emitted from a metal plate increases when

• the frequency of light increases.
• the frequency of light decreases.
• the intensity of light increases.
• the intensity of light decreases.

 The motion of compression and rarefaction through a spring BEST demonstrates which of the following?

• surface waves
• an electromagnetic wave
• a transverse wave
• a longitudinal wave

Find the frequency of a wave, if the wave has a speed of 100 m/s and a wavelength of 2.5 meters. 

• 250 Hertz
• 40 Hertz
• 12.5 Hertz
• 4 Hertz

Which term explains the path of the light ray in this diagram?

• Convection
• Scattering
• Absorption
• Refraction

Waves that require a medium are called 

• mechanical waves
• transverse waves
• light waves
• gamma rays

All electromagnetic waves have the same...

• frequency
• speed
• wavelength
• energy

What is a Generator?

• A machine that converts one form of energy into another, especially mechanical energy into electrical energy, as a dynamo, or electrical energy into sound, as an acoustic generator.

• Electrical Energy

• Mechanical Energy

• Energy

What is the correct type of energy transformation that occurs in a generator?

• Electrical Energy to Magnetic Energy

• Electrical Energy to Mechanical Energy

• Magnetic Energy to Electrical Energy

• Mechanical Energy to Electrical Energy

A device that turns electrical energy into mechanical energy is called  

• an armature
• a rotor
• a commutator
• an electric motor

What is the photoelectric effect?

• Electrons (photoelectrons) are emitted from a metal's surface when light(photon) of a certain frequency shines on a surface

• When photoelectrons attract to a surface and show up dull