German Abitur · Physics

Electricity, Waves, Heat and Modern Physics

22 practice questions, each with the answer and an explanation.

Practise Electricity, Waves, Heat and Modern Physics now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 22 questions

  1. What current flows through a resistor of when is applied?
  2. Two resistors of and are connected in parallel. What is the total resistance?
  3. A device runs on and draws a current of . What is its power?
  4. In a series circuit with three bulbs, one bulb burns out. What happens to the other bulbs?
  5. A transformer's primary coil has turns at , and the secondary coil has turns. What is the secondary voltage?
  6. A capacitor of is charged to . How much energy is stored in it?
  7. What does Lenz's law state about an induced current?
  8. A heat engine works between reservoirs at and . What is the largest possible efficiency?
  9. A wave has frequency and wavelength . What is its speed?
  10. What kind of wave is sound in air?
  11. A source of sound moves towards a stationary observer. How does the observed frequency compare with the emitted frequency?
  12. What does the double-slit experiment with light demonstrate?
  13. Which change raises the maximum kinetic energy of electrons in the photoelectric effect?
  14. A photon has frequency (use ). What is its energy?
  15. If the momentum of a particle is doubled, what happens to its de Broglie wavelength?
  16. A clock moves at relative to an observer (). The clock shows pass. How long does this take according to the observer?
  17. How much heat is needed to warm of water by (specific heat capacity )?
  18. A machine takes in of energy and delivers of useful work. What is its efficiency?
  19. Which form of heat transfer works through a vacuum?
  20. A sample has a half-life of days and starts at . How much of it remains after days?
  21. Which type of radiation is stopped by a sheet of paper?
  22. What happens in nuclear fission?

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