Physics Past Paper PDF

Part one 1. Use the following words to complete the following sentences Infra-red Microwaves Radio waves Ultra violet Visible light i. Food can be cooked------------------------------------------------------------- ii. Thermometer can detect-----------------...

Part one 1. Use the following words to complete the following sentences Infra-red Microwaves Radio waves Ultra violet Visible light i. Food can be cooked------------------------------------------------------------- ii. Thermometer can detect-------------------------------------------------------- iii. Photographs taken with ordinary camera use-------------------------------- iv. Skin cancer can be caused by ------------------------------------------------- 2. Which list shows electromagnetic waves in order of increasing frequency A. Visible light ,X-rays, Gamma rays B. Visible light, Gamma rays x-rays C. x-rays, Gamma rays, visible light D. Gamma rays, X-rays , visible 3. Table below shows most of the wave’s electromagnetic spectrum, one of the waves is missing. A. Radio Waves Microwaves Infrared Visible light Ultraviolet ------- Gamma ray i. in the Write the missing waves in the space table ii. State type of wave can be split into different colors---------------------------- iii. State type the wave that has the longest wavelength---------------------------- iv. State type of frequency wave has the highest------------------------------------- v. State type of wave has the greatest energy---------------------------------------- B. The sun emits the waves in the electromagnetic spectrum. Explain why all these waves take the same time to travel to earth from the sun. --------------------------------------------------------------------------------------------- C.. State one harmful effect of X-rays on living matter-------------------------------- 4. In a shallow tank, a water wave moves through a barrier with a narrow gap. The diagram shows thewaves on the left-hand side and the right- hand side of the barrier. Which term describes the effect shown? A. reflection C. Refraction B. dispersion D. Diffraction Page 1 of 11  5. Microwaves and X-rays are both electromagnetic waves, which row of the table is correct for microwaves and X-rays in a vacuum. Their speed are Their speed are A. different different different same same different same same 6. Parts of the electromagnetic spectrum have various uses. Which part is used for: A. Heaters and night vision equipment --------------------------------------------------- B. Sterilizing food and medical equipment.---------------------------------------------- 7. Which of these waves is an electromagnetic wave? A. Sound wave B. water wave C. spring wave D. infrared wave 8. Which of the following types of radiation has the shortest wavelength? A. Ultraviolet B. Radio waves C. Light D. X-rays E. Infra-red 9. A transvers waves with a wavelength of 3 m travels at speed of 24m /s. What is the frequency of thewave? A. 72 Hz B. 8 Hz C. 0.33 Hz D. 27 Hz Page 2 of 11  Part two: structural questions 1. The diagram represents the electromagnetic spectrum. a. On the diagram write Gamma and Radio waves? b. Which of the above waves has the longest in wavelength? ------------------------------- c. Which of the above waves has the highest in frequency? -------------------------------- d. State one use of X-rays. ------------------------------------------------------------------- e. State two property that all electromagnetic waves have in common.------------------------- ----------- f. State two property that all electromagnetic waves have in common. i. ------------------------------------------------------------------------------------------------- ii. ------------------------------------------------------------------------------------------------- g. An X-ray has a frequency 2x1018 Hz calculate its wave length? (v = 3x108m/s). --------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------- 2. Calculate the frequency of a sound wave which has a wavelength 20 m and travels at speed of 340m/s. ---------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------- 3. The diagram below shows how two different types of waves can be made to move along a stretched spring. a. What type of wave is shown in part A of the diagram? ----------------------------------------------------------------------------------------------------------------- Page 3 of 11  b. What type of wave is shown in part B of the diagram? ---------------------------------------- c. Explain the difference between waves A and B----------------------------------------------------- d. Referring to part B of the diagram, explain what is meant by a rarefaction and a compression.------------------------------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------- 4. Below is a diagram of a wave. Name the parts of the waves labelled A, B, C and D. A: --------------------------------------------- B: --------------------------------------------- C: --------------------------------------------- D: ---------------------------------------------- 5. Five radio stations transmit waves with the following frequencies. Station 1 Station 2 Station 3 Station 4 Station 5 500, 000 Hz 550, 000 Hz 600, 000 Hz 850, 000 Hz 1000, 000 Hz a. Which station transmits waves of the i. Smallest wave length: ii. Longest wavelength : b. Find the wavelength of the waves whose frequency is 600, 000 Hz, if the speed of the radio waves in airis 3 x 108 m/s? ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- c. Find the wavelength of the waves whose frequency is 1000, 000 Hz, if the speed of the radio waves inair is 3 x 108 m/s? ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- d. The speed of light is 3 x 108 m/s. Calculate the frequency of yellow light of wavelength 6 x10 -7 m. ------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------ Page 4 of 11 6. The diagram below shows a wave with various measurements taken along the wave. a. What is the amplitude of the wave? b. What is the wavelength of the wave? c. Sound wave is longitudinal wave, what is meant by longitudinal wave. ------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------ d. How many complete wave are made? ---------------------------------------------------------------- 7. The diagram shows the electromagnetic spectrum. The pictures show four devices that use electromagnetic waves. Each device uses a different type of electromagnetic wave. Draw a line from each device to the type of electromagnetic wave that it uses. One hasbeen done for you. 8. Electromagnetic waves have many practical uses. Draw one line from each type of electromagnetic wave to its use Page 5 of 11  9. Infrared and microwaves are two types of electromagnetic radiation. The diagram below shows the positions of the two types of radiation within part of the electromagneticspectrum. a. Name one type of electromagnetic radiation which has more energy than infrared. --------------------------------------------------------------------------------------------------------- b. Use the correct answer from the box to complete each sentence. Each answer may be used once, more than once or not all. i. The wavelength of infrared is the wavelength of microwaves. ii. The frequency of microwaves is the frequency of infrared. iii. The speed of microwaves in a vacuum is the speed of infrared in a vacuum. iv. The energy of infrared is the microwaves. v. The energy of infrared is the visible light. 10. The visible light spectrum has a range of frequencies. Figure 1 shows that the frequency increases from red light to violet light. Use the correct answers from the box to complete the sentence. As the frequency of the light waves increases, the wavelength of the light waves -------- -------------------------------------and theenergy of the light waves----------------------------- ------------------------- Page 6 of 11 11. The wavelengths of four different types of electromagnetic wave, including visible light waves, are given in the table below. i. Which of the waves, A, B, or C, is an infra-redwave? --------------------------------------------------------------------------------------------------- ii. A TV station broadcasts at 500.000 Hz the wave travel through the air at 300,000,000 m/s. Calculate the wavelength. Show clearly how you out your answer. --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- iii. Electromagnetic waves travels at speed of 3.0 × 108 m/s. A radio station transmits waves with a wavelength of 2.5 × 102 m. Calculate the frequency of the wave. --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- 12. The diagram below shows the seven types of wave that make up the electromagnetic spectrum. i. Microwaves and visible light can be used for communications Name one more type of electromagnetic wave that can be used for communications. -------------------------------------------------------------------------------------------------------- ii. Name one type of electromagnetic wave that has a longer wavelength than microwaves.--------------------------------------------------------------------------------------- iii. Which quantity is measured in Hertz? a. Frequency b. Wavelength c. Wave speed Page 7 of 11 13. Radio waves, ultra-violet, visible light and X-rays are all types of electromagnetic radiation. a. Choose wavelengths from the list below to complete the table. 3 × 10–8 m, 1 × 10–11 m , 5 × 10–7 m, 1500 m b. Microwaves are another type of electromagnetic radiation. Calculate the frequency of microwaves of wavelength 3cm. the speed of electromagnetic waves is 3 × 108 m/s. ------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------ 14. Give the most suitable type of electromagnetic radiation for the applications stated 15. The diagram below represents a water wave. a. Name the type of the wave? ---------------------------------------------------------------------- b. The wavelength of the wave is---------------------------------------------------------------Mm c. The amplitude is--------------------------------------------------------------------------------Mm Page 8 of 11  16. A microphone and a cathode ray oscilloscope (CRO) can be used to show the pattern of a sound wave. Patterns, A, B, C and D, are shown.They are all drawn to the same scale. a. Which one of the patterns has the smallest amplitude? -------------------------------------- b. Which one of the patterns has the lowest frequency? --------------------------------------- c. Which one of the patterns has the highest frequency? -------------------------------------- 17. The diagram represents a wave travelling from X to Y. a. the amplitude of the wave is: ----------------------------------------------------------------------- b. The wavelength of the wave is:----------------------------------------------------------------------- c. The wave travels from X to Y in 0.5 seconds. Calculate its frequency. ------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------ d. Find the speed of the wave ------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------ Page 9 of 11 18. Use the words in the box to complete the diagram and definition below it. 19. Different parts of the electromagnetic spectrum are useful for different methods of communication. Figure 2 shows a transmitter sending a signal to a satellite orbiting the Earth. a. Which type of electromagnetic wave is used to send a signal to a satellite? Draw a ring around the correct answer. Gamma microwave ultraviolet b. What name is given to the process that occurs aswave L passes into the ionosphere? Diffraction Reflection Refraction Page 10 of 11 Page 11 of 11