Magnetics, Electric intro, optics review

Magnetics, Electric intro, optics review

Multiple Choice

Select the correct order of waves on the EMS 

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

Multiple Choice

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Multiple Choice

Which of the following has the longest wavelength?

• microwaves

• UV rays

• Infrared

• Gamma rays

Multiple Choice

Which electromagnetic waves have the highest frequencies and the shortest wavelengths?

• microwaves
• visible light
• gamma rays

Multiple Choice

What is the number of waves that pass a point in one second?

• Amplitude
• Frequency
• Period
• Wavelength

Multiple Choice

Which is not a part of the electromagnetic spectrum?

• X-rays

• Gamma rays

• Visible light

• Magnetic field

Multiple Choice

A sound wave requires a medium, or material to travel through.

• True
• False

Multiple Choice

Where do sound waves travel the FASTEST?

• solids

• liquids

• gasses

• a vacuum

Multiple Choice

Where do light waves travel FASTEST?

• solids

• liquids

• gasses

• a vacuum

Multiple Choice

What is the angle of reflection?

• 65⁰

• 50⁰

• 25⁰

• 40⁰

Multiple Choice

A normal human eye has a focal length of about 0.023 m. The tip of a pencil is 0.553 m from your eye. What does the 0.553 m represent?

• do

• di

• f

• 1/f

Multiple Choice

A tree is located 40 m from the converging lens of focal length 0.08 m. What does the 0.08 m represent?

• do

• di

• f

• 1/f

Multiple Choice

In the thin lens equation, do represents

• Distance of the object from the lens

• Distance of the image from the lens

• The focal point

Multiple Select

Where can you place an object in order to get an image of the same size as the object? Select all that apply.

• beyond 2F

• at 2F

• between F & 2F

• at F

• between F and the lens

Multiple Choice

A negatively charged plastic comb is brought close to, but does not touch, a small piece of paper. If the comb and the paper are attracted to each other, the charge on the paper

• must be positive

• must be negative

• may be neutral or negative

• may be neutral or positive

Multiple Choice

Insulators are different than conductors in that insulators ____.

• do not contain electrons or protons 
•  do not contain any charge
• have a weaker affinity for electrons 
• do not allow charge to freely move 

Multiple Choice

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...

• the plastic strip acquired extra protons from the cotton.
  
• the plastic strip acquired extra protons from the charging process 
• protons were created as the result of the charging process
  
• the plastic strip lost electrons to the cotton during the charging process 

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Multiple Choice

This picture is an example of a ___________

• Step- Up Transformer

• Step- Down Transformer

• DC Motor

• AC Generator

Multiple Choice

For increasing the voltage ___________ is used.

• Step up transformer

• Step down transformer

• Current transformer

Multiple Choice

An electric motor changes electrical energy to _________ energy.

• mechanical

• chemical

• potential

• electrical

Multiple Choice

A machine that changes electrical energy into mechanical energy

• electromagnetic generator

• electric motor

• electric machine

• electrical magnent

Multiple Choice

Where on a magnet is the magnetic field the strongest?

• Both magnetic poles

• Center of the magnet

• Magnetic north pole