A short homework regarding the science terms of electromagnetism, such as: magnet, electroscope, circuit breaker, transformer, motor, magnetic flux, left-hand rule, and many others.

1. Daet, Justine Claire B. 10 - Hertz
Definition of Science Terms
1. Magnets/ Types of Magnets
A magnet is an objector device thatproduces or gives offa magnetic field.
Types:
a. Permanent magnets: does notlose magnetism
b. Air-core magnets: Current flows through a wire and produces a magnetic field
c. Electromagnets: typically stronger than air-core magnets, it can be turned on and off. It
is a device consisting ofa coil ofinsulated wire wrapped around an iron core.
2. Electroscope
An electroscope detects the presence ofcharge and its relative amount. Itis usually constructed with
a metal plate or sphere atthe top ofa metal postwith thin foil leaves hanging from the bottom ofthe
post.
3. Fuse
A 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 breaker
It is a switch that automatically interrupts the flow of electric current if the current exceeds a preset
limit, measured in amperes.
5. Solenoid
A coil ofwire that acts as an electromagnetwhen a current passes through it, often used to control
the motion of objects, such as switch or relay.
6. Right-hand rule
A rule that uses the shape ofthe right hand to establish the standard orientation of vector quantities
normal to a plane.
7. Left-hand rule
When a wire carrying an electric current is moved in a magnetic field ofa magnetthe magnetic field
induced by the wire reacts with the magnetic field ofthe magnetcausing the wire to move outwards,
it predicts this movement.
8. Fleming’s left hand rule
The 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 line
It is a representation ofthe magnetic field and helps in visualizing its strength and direction.
b. Magnetic flux
They are the lines of force associated with a magnetic field. Its SI unit is the weber.
c. Magnetic field
It is a field of force associated with changing electric fields, as when electric charges are in motion.
They exertdeflective forces on moving electric charges.
d. Magnetic force
It is defined as the power that pulls materials together.
10. Electromagnetic induction
It is the production ofelectromotive force across a conductor.

2. Daet, Justine Claire B. 10 - Hertz
11. Transformer
A device used to change the voltage ofan alternating current in one circuitto a different voltage in a
second circuit, or to partially isolate two circuits from each other.
12. Motor
It is a machine that uses energy (e.g.electrical or chemical energy) to produce mechanical motion.
13. Generator
A machine that converts mechanical energy into electricity to serve as a power source for other
machines.
14. Galvanometer
It is an instrument that detects small electric currents and indicates their direction and relative
strength.
15. Current-carrying coil
Otherwise known as a solenoid, itis 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
AmericanHeritageScienceDictionary(2007edition)