Daet, Justine Claire B. 10 - Hertz

Definition of Science Terms

1. Magnets/ Types of MagnetsA magnet is an object or device that produces or gives off a magnetic field.Types:

a. Permanent magnets: does not lose magnetismb. Air-core magnets: Current flows through a wire and produces a magnetic fieldc. Electromagnets: typically stronger than air-core magnets, it can be turned on and off. It

is a device consisting of a coil of insulated wire wrapped around an iron core.2. Electroscope

An electroscope detects the presence of charge and its relative amount. It is usually constructed with a metal plate or sphere at the top of a metal post with thin foil leaves hanging from the bottom of the post.

3. FuseA fuse is a safety device that protects an electric circuit from becoming overloaded. It contains a length of thin wire that melts and breaks the circuit if too much current flows through it.

4. Circuit breakerIt is a switch that automatically interrupts the flow of electric current if the current exceeds a preset limit, measured in amperes.

5. SolenoidA coil of wire that acts as an electromagnet when a current passes through it, often used to control the motion of objects, such as switch or relay.

6. Right-hand ruleA rule that uses the shape of the right hand to establish the standard orientation of vector quantities normal to a plane.

7. Left-hand ruleWhen a wire carrying an electric current is moved in a magnetic field of a magnet the magnetic field induced by the wire reacts with the magnetic field of the magnet causing the wire to move outwards, it predicts this movement.

8. Fleming’s left hand ruleThe rule consists of the finding that whenever a current-carrying conductor is placed inside a magnetic field, a force acts on the conductor, in a direction perpendicular to both the directions of the current and the magnetic field.

9. a. Magnetic lineIt is a representation of the magnetic field and helps in visualizing its strength and direction.b. Magnetic fluxThey are the lines of force associated with a magnetic field. Its SI unit is the weber.c. Magnetic fieldIt is a field of force associated with changing electric fields, as when electric charges are in motion. They exert deflective forces on moving electric charges.d. Magnetic forceIt is defined as the power that pulls materials together.

10. Electromagnetic inductionIt is the production of electromotive force across a conductor.

11. TransformerA device used to change the voltage of an alternating current in one circuit to a different voltage in a second circuit, or to partially isolate two circuits from each other.

Daet, Justine Claire B. 10 - Hertz

12. MotorIt is a machine that uses energy (e.g. electrical or chemical energy) to produce mechanical motion.

13. GeneratorA machine that converts mechanical energy into electricity to serve as a power source for other machines.

14. GalvanometerIt is an instrument that detects small electric currents and indicates their direction and relative strength.

15. Current-carrying coilOtherwise known as a solenoid, it is a wire that acts like a magnet when a current passes through it.

Sources:

http://www.physics4kids.com/files/elec_magnets.html

http://www.regentsprep.org/Regents/physics/phys03/aeleclab/nerscope.htm

https://www.le.ac.uk/se/centres/sci/selfstudy/mam12.htm

http://www.electrical4u.com/fleming-left-hand-rule-and-fleming-right-hand-rule/

https://www.boundless.com/physics/textbooks/boundless-physics-textbook/magnetism-21/magnetism-and-magnetic-fields-155/magnetic-field-lines-549-6686/

http://www.yourdictionary.com/magnetic-force

American Heritage Science Dictionary (2007 edition)