Electricity
What happens to an object's charge that loses electrons?
Positively-charged (has more protons)
The end part of a magnet is called...
A pole
How to do electromagnetic induction?
By moving a magnet in a solenoid to change the magnetic field which in turn will change electric current
What gives an electromagnet the ability to lift heavy things?
A strong electric current that generates magnetic field
Vehicle system that moves due to the changing of electromagnetic poles
Magnetic levitation (Maglev)
An electric circuit that has more than one current path
Parallel circuit
What would happen if you touched a south pole end of a magnet to a north pole end of another magnet?
They will attract each other
How to create an AC current?
By alternating the electric power source's polarity
The central part of an electromagnet?
An iron core
This phenomenon is caused by the solar wind bending and charging the Earth's magnetic field
Aurora lights
The reason why our houses and buildings are not assembled as a series circuit
Turning off one appliance will turn of everything
Can gold be attracted by magnets?
No, gold is not a magnetic material
How do loudspeakers use magnetism to produce sound?
Electric pulses change magnetic field to move the cone to produce different sounds
A helical coil of wire whose length is substantially greater than its diameter, which generates a controlled magnetic field
Solenoid
Earth's magnetic field is caused by what?
Convection currents of the molten outer core around solid metallic inner core of the Earth
A series circuit has two 1.5 V batteries and a 3 Ohm bulb. What is the current?
1 A
True or False: The North Magnetic Pole is found in the northern part of the Earth
False, it is in the south
How to use the Fleming's Left Hand rule?
To find the direction of force applied to a wire by a magnetic force, use the thumb, first finger, and the second one.
The lines in a magnet bar diagram shows direction of magnetic power from which pole?
North pole
A burst of high-energy electromagnetic radiation caused by a huge release of energy, can be focused as a weapon
Electromagnetic pulse (EMP)
If the voltage through an electric circuit is quadrupled, the current would be...
Magnetism is caused by the alignment of...
Electrons
A wire has a length of 2.5 m with current of 1.5 A. The magnetic flux density is 0.05 T. Calculate the force acting on the wire!
F = B x I x l
0.05 x 1.5 x 2.5 = 0.19 Newton
The production of electromotive force (voltage) by moving conductors or magnets
Electromagnetic induction
Audio recording and playing device that uses magnetic tape for data storage
Casette tape