What's voltage?
It's the measure of charge imbalance between two bodies.
What does A stand for?
Ampere
If there is a difference of potential between two bodies, a flow of charges is produced by the body with a higher potential.
True
False
What is electricity?
It is a flow of charges (or electrons)
Mention some advantages of electricity.
It's easy to produce, distribute and it's clean.
Mention some disadvantages of electricity.
Its production pollutes, it's difficult to store
How is resistance in plastic?
High
Low
Atoms never have an electrical charge.
False
True
Orbiting electrons can move away from the atom if they lose some energy.
True
False
When was electricity first observed?
In ancient times (amber experiment)
What's charge imbalance?
It's the difference of potential between two bodies (one is positively charged and the other is negatively charged)
What's a static discharge?
It's the movement of electrons that restores the charge balance between two bodies.
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.
What's an ion?
It's an atom with more protons than electrons / more electrons than protons
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.
Electromagnetic sparks and lightnings are two phenomena based on the same atomic property.
False
True
What does Ω stand for?
Ohm (Measurement unit of resistance)
What's the atom's composition?
Nucleus (or core) formed by neutrons and electrons in the centre. Electrons orbiting around the nucleus.
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
How is resistance in iron?
Low
High
What does I stand for?
Intensity
All electrons orbit at equal distance from the nucleus.
True
False
What does C stand for?
Coulomb
What is resistance?
It's the opposition towards the passage of electricity.
What's power?
It's the rate of flow of electrons.
What does V stand for?
Volt (voltage)