Answers2001310 Earth Science Sem 1 - PearsonApplications of Electromagnetic Induction

Applications of Electromagnetic Induction — Unit test Answers

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Which situation would result in interference?

A
a wave bouncing off an object
B
a wave bending as it moves through an object
C
a wave scattering as it moves through an object
D
a wave increasing in energy as it hits another wave
22
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Which process would correctly calculate the frequency of a wave?

A
dividing speed by wavelength
B
dividing frequency by wavelength
C
multiplying frequency by period
D
dividing wavelength by period
23

A 2-column table with 4 rows. The first column labeled wave has entries W, X, Y, Z. The second column labeled Observations has entries its motion is perpendicular to wave motion, its particles move up and down, its particles only move small amounts, its motion is parallel to wave motion.

Question illustration
A
Waves W and Y are transverse waves, Wave X could be a longitudinal or transverse wave, and Wave Z is a longitudinal wave.
B
Waves W and Y are longitudinal waves, Wave X could be a longitudinal or transverse wave, and Wave Z is a transverse wave.
C
Waves W and X are longitudinal waves, Wave Y could be a longitudinal or transverse wave, and Wave Z is a transverse wave.
D
Waves W and X are transverse waves, Wave Y could be a longitudinal or transverse wave, and Wave Z is a longitudinal wave.
24

When light from one source, X, strikes a metal, electrons are ejected. When light from another source, Y, strikes the same metal, electrons are not ejected.

A
Light from source X has a higher intensity than light from source Y.
B
Light from source X has a lower intensity than light from source Y.
C
Photons of light from source X carry more energy than photons of light from source Y.
D
Photons of light from source X carry less energy than photons of light from source Y.
25

In which direction of the wave motion do longitudinal waves transfer energy?

A
perpendicular
B
parallel
C
close
D
equal
26

What is common between transverse waves and longitudinal waves?

A
Both include an amplitude, crest, and rarefactions
B
Both move faster at higher temperatures
C
Both move slower through densely packed molecules
D
Both include a wavelength from compression to compression
27

Which idea did Isaac Newton’s experiments with light support?

A
Light is produced by the interaction of magnetic and electric fields.
B
Light is a wave because it has properties that are similar to radio waves.
C
Light is made of particles because it travels only in a straight path.
D
Light is a wave because it bends around barriers.
28

Which waves can travel through space?

A
electromagnetic waves only
B
mechanical waves only
C
electromagnetic and mechanical waves
D
longitudinal and electromagnetic waves
29

Which statement can be made about the amplitude of any transverse wave?

A
It is the length from the midpoint to the crest.
B
It is half the length from the midpoint to the trough.
C
It is the length of the wavelength.
D
It is half the length of the wavelength.
30

A photon has 8.0 × 10–15 J of energy. Planck’s constant is 6.63 × 10–34 J•s.

A
1.21 × 1019 Hz
B
8.3 × 10–20 Hz
C
1.21 × 10–19 Hz
D
8.3 × 1020 Hz

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