1. Which of these is not a vector quantity?

• A. Acceleration
• B. Velocity
• C. Time
• D. Force

2. A volt is defined as

• A. one coulomb per joule
• B. one joule per coulomb
• C. one joule per amp
• D. one amp per joule

3. The plastic in the picture is being rubbed by the cloth. The plastic becomes positively charged. Which of these sentences describes what is being transferred?

• A. Positive charges transferred to the cloth
• B. Negative charges transferred to the cloth
• C. Positive charges transferred to the plastic
• D. Negative charges transferred to the plastic

4. Static electricity can be a problem, but which of these applications uses static electricity?

• A. Ink jet printers
• B. Radiotherapy treatments
• C. Mobile (cell) phones
• D. Loudspeakers

5. Which of these is not a conductor of electricity?

• A. graphite
• B. steel
• C. sea water
• D. plastic

6. Which of these diagrams shows the motion of waves passing through a gap of similar size to the wavelength?

7. What is this effect (above) called?

• A. refraction
• B. deflection
• C. diffusion
• D. diffraction

8. What do you call a device with a screen that can be used with a microphone to display a sound wave?

• A. Oscilloscope
• B. Stethoscope
• C. Sound sensor
• D. Signal generator

Here are 4 sound waves shown on one of these devices.

Which of these diagrams shows...

9. A loud, high pitched sound?

10. A quiet high frequency sound?

11.Which of the answers below correctly lists some advantages and disadvantages of a nuclear power station?

12. A wind farm power station is a renewable energy source. Which one of these is not a disadvantage?

• A. Low power output
• B. Noise pollution
• C. High maintanance costs
• D. Unreliable output

13. A digital signal has only two output states - '1' or '0'. A continuously varying signal is called

• A. a wave signal
• B. an anologue signal
• C. a binary signal
• D. an f.m. signal

14. The pressure in a fluid depends on the gravitational field strength. It also depends on

• A. the density of the fluid and the depth
• B. the volume of the object and the depth
• C. the surface area of the object and the density
• D. the mass of the object and the depth

15. The temperature of a gas measured in kelvin is proprtional to

• A. the average kinetic energy of the molecules
• B. the average mass of the molecules
• C. the average speed of the molecules
• D. the average velocity of the molecules