P1

Physics

1. Hot objects emit...

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1. More infra-red radiation

2. Less infra-red radiation

3. Less electrons

4. More neutrons

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2. Which surfaces are the best absorbers and emitters of IR radiation?

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1. Light, shiny surfaces

2. Dark, shiny surfaces

3. Dark, matt surfaces

4. Light, matt suraces

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3. Which surfaces are the best reflectors of IR radiation?

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1. Light, shiny surfaces

2. Dark, shiny surfaces

3. Dark, matt surfaces

4. Light, matt suraces

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4.Water can exist in the following states. Which has the most energy?

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1. Solid

2. Liquid

3. Gas

4. Texas

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5. Which of the following energy transformations can only occur in solids?

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1. Evaporation

2. Radiation

3. Convection

4. Conduction

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6. What characteristic does not affect the rate of energy transfer by heating?

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1. Temperature difference

2. Material

3. Surface area and volume

4. Time

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7. What is a U value?

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1. A measure of how well a building transfers heat

2. The lowest temperature possible

3. A measure of the permittivity of free space

4. A description of the colour and texture of a surface

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8. What doesn't a solar panel do?

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1. Provides electricity to homes

2. Provides hot water to buildings

3. Provides heating to buildings

4. Reduces energy bills for a building

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10. What is the law of conservation of energy?

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1. Energy can only be wasted through heat

2. Energy cannot be created or destroyed, only changed

3. Power is the rate of change of energy

4. Energy is transferred from a high concentration of a low concentration through a semi-permeable membrane

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11. What is the efficiency calculation?

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1. input / output

2. output / input

3. useful / input

4. total useful / total wasted

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12. What is the energy transfer diagram for a remote control?

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1. Chemical -> Light

2. Electrical -> Electrical

3. Electrical -> Light

4. Gravitational -> Kinetic

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13. A 800 W microwave heats a bowl of soup on full power for 2 minutes. How much energy does it use?

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1. 1600 J

2. 400 J

3. 0.15 J

4. 96 000 J

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14. How many joules in a kilo-watt-hour?

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1. 3.6 MJ

2. 3.6 kJ

3. 3.6 TJ

4. 3.6 J

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15. What device allows us to generate most of our electricity

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1. Resistor

2. Capacitor

3. Boiler

4. Generator

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16. Which energy resources are not renewable?

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1. Nuclear

2. Geothermal

3. Tidal

4. Solar

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17. What is the highest voltage carried by the national grid?

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1. 275 kV

2. 400 kV

3. 230 V

4. 132 kV

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18. What is never true about waves?

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1. They can be longitudinal or transverse

2. They carry energy or information

3. They need a medium to travel through

4. They travel at over 300 000 000 m/s

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19. What does the image show?

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1. Reflection

2. Refraction

3. Diffraction

4. Total internal reflection

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20. What is the wave equation for wave speed?

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1. frequency x wavelength

2. distance / time

3. frequency x distance

4. time / wavelength

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21. Which region has the shortest wavelength?

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1. Gamma

2. Radio

3. Infra-red

4. Microwave

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22. Relative to the normal, what is the angle of reflection equal to?

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1. The angle of refraction

2. The angle of incidence

3. The angle of diffraction

4. The angle perpendicular to the normal

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23. What feature is not present in the image created by a plane mirror?

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1. Virtual

2. Upright

3. Laterally inverted

4. Enlarged

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24. What feature of a sound wave determines its loudness?

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1. Frequency

2. Pitch

3. Amplitude

4. Wavelength

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25. What is the change in observed wavelength caused by relative movement called?

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1. Doppler effect

2. Refraction

3. Condensation

4. Red shift

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26. What is the observed increase in wavelength of distance galaxies called?

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1. Doppler effect

2. Refraction

3. Condensation

4. Red shift

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27. What does the observed red shift provide evidence for?

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1. Evolutionary theory

2. Particle theory

3. Germ theory

4. Big Bang theory

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28. What evidence is there for CMBR?

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1. Galaxies are all moving away from one another

2. Temperature of space is not 0

3. Stars spin on their axes too quickly

4. The Milky Way galactic year is 250 000 000 years

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