What's the difference between static electricity and current electricity?
Static electricity is created by a charge imbalance in multiple directions; current electricity moves in one direction through a conductor
When was electricity first observed?
In ancient times (amber experiment)
Mention some advantages of electricity.
It's easy to produce, distribute and it's clean.
What's an ion?
It's an atom with more protons than electrons / more electrons than protons
What does I stand for?
Intensity
Mention some disadvantages of electricity.
Its production pollutes, it's difficult to store
What does A stand for?
Ampere
Electromagnetic sparks and lightnings are two phenomena based on the same atomic property.
False
True
What is electricity?
It is a flow of charges (or electrons)
What is resistance?
It's the opposition towards the passage of electricity.
Atoms never have an electrical charge.
True
False
What does V stand for?
Volt (voltage)
What's voltage?
It's the measure of charge imbalance between two bodies.
How is resistance in iron?
Low
High
What's power?
It's the rate of flow of electrons.
Orbiting electrons can move away from the atom if they lose some energy.
False
True
If there is a difference of potential between two bodies, a flow of charges is produced by the body with a higher potential.
False
True
How is resistance in plastic?
Low
High
Mention some details about subatomic particles.
Neutrons have no electric charge; protons have positive c.; electrons have negative c.; neutrons are lighter than other particles.
What's a static discharge?
It's the movement of electrons that restores the charge balance between two bodies.
What's the atom's composition?
Nucleus (or core) formed by neutrons and electrons in the centre. Electrons orbiting around the nucleus.
All electrons orbit at equal distance from the nucleus.
True
False
What does Ω stand for?
Ohm (Measurement unit of resistance)
What's charge imbalance?
It's the difference of potential between two bodies (one is positively charged and the other is negatively charged)
What does C stand for?
Coulomb
What happens on molecular level when you rub amber with a cloth?
Electrons gain energy, they move towards other material and can attract material with opposite charge.