Electromagnetism

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Across
  1. 1. Transformer A type of transformer that decreases the voltage from the primary winding to the secondary winding. It has fewer turns in the secondary coil than the primary coil.
  2. 4. A coil of wire wound in the shape of a cylinder that produces a magnetic field when an electric current flows through it. It is often used to generate controlled magnetic fields.
  3. 5. A type of transformer that increases the voltage from the primary winding to the secondary winding. It has more turns in the secondary coil than the primary coil.
  4. 6. A phenomenon by which materials exert attractive or repulsive forces on other materials. It arises from the movement of electric charges within atoms.
  5. 7. A rule used to determine the direction of the magnetic field produced by a current-carrying conductor. It relates the current, magnetic field, and force using the thumb and curl of the fingers.
  6. 10. The unit of magnetic field strength. It is equal to one newton per square ampereâ‹…meter.
  7. 12. The moving part of an electric motor or generator. It consists of coils of wire wrapped around a core and rotates within a magnetic field, generating electric current.
  8. 15. A region within a magnetic material where the magnetic moments of atoms or molecules are aligned in the same direction, creating a net magnetic field.
  9. 16. A rule used to determine the direction of the magnetic field produced by a current in a solenoid.
  10. 17. A type of commutator used to reverse the direction of the current in an electric motor's coil, ensuring continuous rotation in the same direction. Found in DC motors and DC generators.
  11. 18. A commutator with a ring divided into two or more segments, used to reverse current direction in the coil. Found in AC generators and some AC motors.
  12. 19. The physicist who in 1820 observed that an electric current produces a magnetic field, which was a pivotal moment in the study of electromagnetism.
  13. 20. This law states that the direction of the induced electromotive force (EMF) in a conductor loop is such that it opposes the change that produced it. It is a consequence of conservation of energy.
Down
  1. 2. This law states that a changing magnetic field induces an electromotive force (EMF) in a closed circuit. The magnitude of the induced EMF is proportional to the rate of change of magnetic flux.
  2. 3. The measure of the quantity of magnetic field lines passing through a given area.
  3. 8. A region around a magnetic material or a moving electric charge within which the force of magnetism acts.
  4. 9. instrument that indicates direction relative to the Earth's magnetic poles. It aligns with the Earth's magnetic field, pointing towards the magnetic north.
  5. 11. A rule used to determine the direction of the magnetic force produced by a current-carrying wire or an electric charge moving in a magnetic field.
  6. 13. A device that converts electrical energy into mechanical energy. It operates based on the interaction between magnetic fields and electric currents.
  7. 14. A device that converts mechanical energy into electrical energy.