Across
- 4. A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
- 8. Having a high susceptibility to magnetization, the strength of which depends on that of the applied magnetizing field, and that may persist after removal of the applied field.
- 12. If the thumb, the forefinger, and the middle finger of the right hand are bent at right angles to one another with the thumb pointed in the direction of motion of a conductor relative to a magnetic field and the forefinger in the direction of the field, then the middle finger will point in the direction of the induced electromotive force
- 14. 96,485.34 Coulombs
- 15. The formation of new areas of oceanic crust, which occurs through the upwelling of magma at mid ocean ridges and its subsequent outward movement on either side.
- 17. The magnetic field of a current has always ________ ______, in contrast to the electrostatic field lines, which start on positive charges (sources) and end on negative charges
- 18. A device that converts motive power into electrical power for use in an external circuit.
- 19. An instrument containing a magnetized pointer that shows the direction of magnetic north and bearings from it.
- 20. Region in which the magnetic fields of atoms are grouped together and aligned.
- 22. A cylindrical coil of wire acting as a magnet when carrying electric current.
- 23. A ferrimagnetic rock mineral and one of the main iron ores
- 24. Led the largest ships in the world on seven voyages of exploration to the lands around the Indian Ocean, demonstrating Chinese excellence at shipbuilding and navigation.
- 25. A force is any interaction that, when unopposed, will change the motion of an object
- 26. Any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy
Down
- 1. An electric motor driven by an alternating current.
- 2. Drive or force (an attack or attacker) back or away.
- 3. Each of the points near the extremities of the axis of rotation of the earth or another celestial body where a magnetic needle dips vertically.
- 5. Changes in direction or orientation of the magnetic field of the Earth that have occurred from time to time.
- 6. An instrument for detecting and measuring small electric currents.
- 7. A flow of electric charge
- 9. Danish physicist and chemist who discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism
- 10. Cause to come to a place or participate in a venture by offering something of interest, favorable conditions, or opportunities.
- 11. The production of an electric or magnetic state by the proximity of an electrified or magnetized body.
- 13. A silicate mineral or igneous rock that is rich in magnesium and iron
- 16. The surface integral of the normal component of the magnetic field B passing through that surface
- 21. The rotating coil or coils of a dynamo or electric motor.