Paper 3 Speed of Sound in Air

What equation links wave speed, frequency, and wavelength?

• v = fλ

• v = f/λ

• v = λ/f

• v = f + λ

How can the frequency of a signal be measured from the oscilloscope?

• By measuring the amplitude of the wave.

• By measuring the time between two identical points on adjacent waves.

• By measuring the voltage of the signal.

• By measuring the phase difference between waves.

What is the time period of a signal?

• The time between two identical points on adjacent waves.

• The amplitude of the wave.

• The voltage of the signal.

• The phase difference between waves.

How is the frequency of a signal related to its time period?

• Frequency is the square of the time period.

• Frequency is the sum of the time period.

• Frequency is the inverse of the time period.

• Frequency is the product of the time period.

What two traces should be displayed on the oscilloscope screen?

• The signal sent to the loudspeaker and the signal taken in by the microphone

• The signal sent to the loudspeaker and the signal taken in by the amplifier

• The signal sent to the microphone and the signal taken in by the loudspeaker

• The signal sent to the amplifier and the signal taken in by the microphone

What happens to the two traces as the distance between the speaker and microphone is increased?

• The two traces will move past each other and the phase between the traces will change.

• The two traces will remain stationary and the phase between the traces will stay the same.

• The two traces will move closer together and the phase between the traces will change.

• The two traces will disappear and the phase between the traces will stay the same.

What piece of apparatus should be connected to the loudspeaker to produce a tone?

• Microphone

• Signal generator

• Oscilloscope

• Voltmeter

What piece of apparatus should be connected to the loudspeaker to produce a tone?

• Signal generator

• Power supply

• Microphone

• Voltmeter

What should the signal generator also be connected to so that its signal trace is displayed?

• Voltmeter

• Oscilloscope

• Ammeter

• Frequency counter

How should the spacing of the two signals inputted into the oscilloscope be adjusted?

• So that one is directly above the other

• So that one is to the left of the other

• So that one is below the other

• So that one is to the right of the other