These will help you on your study guide, show all your steps and the formulas used to solve

What is the current in a 60-W, 120-V light bulb?

A CD player with a resistance of 80 has a current of 0.5 amps flowing through it. How many volts supply the CD player?

How much current (in amperes) does a 220-V space heater need if it has a resistance of 50 ?

Two waves can combine with each other in a way that either amplifies or cancels out the original light waves.

If a wave is amplified, this is called

• diffraction grating
• destructive interference
• north polarization
• constructive interference
• Refraction

If a wave is canceled out, this is called

• diffraction grating
• destructive interference
• north polarization
• constructive interference
• Refraction

Match the following.

x-rays

• higher frequency and shorter wavelength
• lower frequency and longer wavelength
• lower frequency and shorter wavelength
• higher frequency and longer wavelength

visible light

• higher frequency and shorter wavelength
• lower frequency and longer wavelength
• lower frequency and shorter wavelength
• higher frequency and longer wavelength