Physical Science Review

What is the cause of electricity?

• Magnetism

• Gravity

• Moving electrons

• Lightning

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To decrease the strength of a magnetic field around an electromagnet, we must

• increase the number of coils

• increase the size of the iron core

• decrease the size of the iron core

• decrease the number of coils

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Surrounding each magnetic is an invisible force field called

• Gravity

• A magnetic field

• An electric field

• The Force

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Which of the two below result in an attractive force?

• A positive charge and a negative charge

• Two negative charges

• Two south poles

• A north pole and a south pole

• Two postive charges

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What property of this wave is represented by the letter "A"

• amplitude

• crest

• trough

• wavelength

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What property of the wave is represented by the letter "B"?

• amplitude

• crest

• trough

• wavelength

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The lowest point on a wave is the:

• Amplitude

• Crest

• Trough

• Wavelength

The number of wavelengths that pass a point each per second is:

• frequency

• period

• longitudinal 

• transverse wave 

The type of waves that require medium to pass:

• Mechanical Waves

• Electromagnetic Waves

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength is not directly affected by the frequency of a wave.

• The wavelength increases.

• The wavelength decreases.

• More specific information is needed to form a conclusion about the wavelength.

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