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Review: Physics

1 st term. Review: Physics. Question 1: Which material(s) can NOT be magnetized?. copper (Cu) nickel (Ni) iron (Fe) cobalt (Co). Question 2: Where is the magnetic force strongest?. At the poles. In the centre. On top. It's equally strong everywhere.

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Review: Physics

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  1. 1st term Review: Physics

  2. Question 1: Which material(s) can NOT be magnetized? • copper (Cu) • nickel (Ni) • iron (Fe) • cobalt (Co)

  3. Question 2: Where is the magnetic force strongest? • At the poles. • In the centre. • On top. • It's equally strong everywhere.

  4. Question 3: How can you demagnetize a magnet? • by rubbing it. • by heating it. • by shaking it. • by colouring it.

  5. Question 4: What can be used to show the magnetic field? • compass needles • paper scraps • aluminium • iron filings

  6. Question 5:There is no such thing as... • a magnetic field. • a magnetic monopole. • an electromagnet. • a permanent magnet.

  7. Question 6:Which animals do NOT have a magnetic sense? • elephants • sharks • pigeons • migratory birds

  8. Question 7:Where does magnetism come from? • from the adhesive forces between molecules. • from the protons attracting neutrons. • from the electrons moving around the atomic nucleus. • from electric current.

  9. Question 8:How can you magnetize a piece of steel? • by placing it near a magnet. • by rubbing it with one end of a magnet. • by heating it. • by placing it in a coil of wire and pass current through the coil.

  10. Question 9:The magnetic field of a current-carrying coil is similar to... • the magnetic field of a current-carrying wire • the magnetic field of a ring magnet • the magnetic field of a bar magnet • the magnetic field of a horseshoe magnet

  11. Question 10:The experiment that showed that every electric current produces a magnetic field was conducted by... • Isaac Newton • Michael Faraday • Hans Christian Ørsted • Albert Einstein

  12. Question 11:What do you need to build an electromagnet? • a volt meter • a wire • a power supply • an iron core

  13. Question 12:In which device is there no electromagnet? • electric bell • electric motor • compass • loud speaker

  14. Question 13:In order to keep an electromotor rotating after half a turn you need... • a turbine. • a coil. • a commutator. • a dynamo.

  15. Question 14:A generator converts... • electric energy into kinetic energy. • radiant energy into electric energy. • dinetic energy into radiant energy. • kinetic energy into electric energy.

  16. Question 15: Which physical principle does a generator use? • law of conservation of energy • induction • magnetism • refraction of light

  17. Question 16:Which of the following is a DC source? • power socket • battery • solar cell • accumulator

  18. Question 17:What is the frequency of AC current in the mains in Europe? • 100 Hz • 100 Volts • 50 Hz • 230 Volts

  19. Question 18:A device for converting current and voltage is called... • transformer. • generator. • uniformator. • transistor.

  20. Question 19:An efficient power plant makes use of... • power-heat-coupling. • current-heat-coupling. • force-current-coupling. • light-current-coupling.

  21. Question 20:A renewable energy resource is... • coal • wood • oil • gas

  22. Question 21:Which is NOT a greenhouse gas? • methane • oxygen • CFCs • carbon dioxide

  23. Question 22:An advantage of nuclear power plants is the fact that... • they use renewable energy resources. • they can be built in a short period of time. • they do not emit CO2. • all of the garbage can be recycled.

  24. Question 23:Wood is called CO2-neutral because • it is a natural energy resource. • it takes up as much CO2 when growing as it emits when burned. • it does not emit CO2 when growing. • burning it does not emit greenhouse gases.

  25. CONGRATULATIONS!!!!!

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