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6. How are stars created?
- A magnetic field pulls dust, rock and gas together
- Rocks crash into each other quickly
- Rock expand because of the pressure in a vacuum
- Gravitional attraction pulls dust, rock and gas together
- Large stars split to form two smaller stars
7. Which is not a way potential difference in a generator can be increased?
- Increasing the circumference of the coils
- Increasing the speed of the magnet
- Increasing the strength of the magnetic field
- Increasing the number of turns on the coil
8. What is the core of a transformer made of?
- Copper
- Tin
- Lead
- Iron
- Nickel
9. Which of these is the correct formula?
- Distance = Force x Moment
- Moment = Distance x Force
- Force = Moment x Distance
10. A converging mirror will produce an inverted image.