Paper 2 H - SAMPLE SET 1 Q2
2) A baby monitor has a sensor unit that transmits an image of the baby and the noises the baby makes to a monitor unit. The monitor unit then displays an image of the baby and emits the noises the baby makes.
2.1) Compare the properties of the waves that transmit images and noises from the monitor unit. [4 marks]
2.2) The sensor unit can detect infrared and visible light.
Suggest one advantage of being able to detect infrared. [1 mark]
2.3) Write down the equation that links frequency, wave speed and wavelength. [1 mark]
Equation ____________________________________________
2.4) The signals for the monitor unit are transmitted as electromagnetic waves with a wavelength of 0.125 m.
Wave speed of electromagnetic waves = 3 x 108 m/s
Calculate the frequency of the signal. [3 marks]
2.1) Compare the properties of the waves that transmit images and noises from the monitor unit. [4 marks]
2.2) The sensor unit can detect infrared and visible light.
Suggest one advantage of being able to detect infrared. [1 mark]
2.3) Write down the equation that links frequency, wave speed and wavelength. [1 mark]
Equation ____________________________________________
2.4) The signals for the monitor unit are transmitted as electromagnetic waves with a wavelength of 0.125 m.
Wave speed of electromagnetic waves = 3 x 108 m/s
Calculate the frequency of the signal. [3 marks]
Frequency = ____________________ Hz
(Total for Question 2 = 9 marks)