Understanding Waves and Signals Quiz

A wave has an amplitude of 3 meters. If the amplitude is doubled, what happens to the energy of the wave?

• The energy is halved.

• The energy is doubled.

• The energy is quadrupled.

• The energy remains the same.

Which of the following materials is most likely to transmit a wave without reflecting or absorbing it?

• A mirror

• A wooden door

• Clear glass

• A brick wall

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Why are digitized signals considered more reliable than analog signals for transmitting information?

• They are less affected by noise.

• They require more bandwidth.

• They are more expensive to produce.

• They are easier to distort.

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If a wave has a frequency of 5 Hz and a wavelength of 2 meters, what is its speed?

• 2 m/s

• 5 m/s

• 10 m/s

• 15 m/s

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When a wave encounters a boundary between two different materials, which of the following can occur?

• Only reflection

• Only absorption

• Only transmission

• Reflection, absorption, or transmission

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Which of the following is an advantage of using digital signals over analog signals?

• Digital signals are more susceptible to interference.

• Digital signals can be easily compressed.

• Digital signals have a lower quality.

• Digital signals are harder to store.

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A wave with a higher amplitude will have:

• Less energy

• More energy

• The same energy

• No energy

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What happens to a wave when it is absorbed by a material?

• It increases in speed.

• It decreases in frequency.

• It is converted into other forms of energy.

• It reflects back.

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Which of the following best describes a digital signal?

• A continuous wave

• A series of discrete values

• A wave with varying amplitude

• A wave with varying frequency

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If the amplitude of a wave is reduced by half, what happens to the energy of the wave?

• The energy is reduced to one-fourth.

• The energy is reduced to one-half.

• The energy remains the same.

• The energy is doubled.

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