Chapter 3 - Electricity (3.1) Part 1 Flashcards
What is the measurement of electric charge
Coulombs ( C )
What is the charge of 1 electron
-1.6x10^-19
What is the equation for charge?
Number of electrons x Charge of an electron
Definition of current?
The rate of movement of current
When does current occur?
When a charged particle that is free to move experiences an electric force. The particle is accelerated by the force.
What is the formula for current?
Current = charge passing a point / time for charge to pass
What are Ionic charge carriers?
Charged particles that aren’t electrons that can carry electricity ( can move through object like electric current) for example aluminium ions
SI units for 1 Ampere?
1 C/s
What is charge?
The cause of electromagnetic force and the basic aspect to describe electrical effects
Equation for voltage?
Energy transferred / Charge passing point
What is the correct term for the voltage going into a circuit?
Electromotive force (EMF)
What is the correct term for the voltage being transformed into other forms of energy?
Potential difference
What is the amount of energy per 1 electron volt ?
1 eV = 1.6x10^-19 J
Equation for resistance
R = V / I
If a component through which current is proportional to the voltage. What is the component referred to as?
An Ohmic Conductor, because it follows ohms law
Shape of filament lamp graph (Current against PD)
S shaped
Shape of I-V graph for diode?
L shape lying on its back
Shape of IV graph for thermistor
S but inverted
What does ohms law state?
Ohm’s law states that the current through a component is directly proportional to the voltage across it providing temperature remains the same
What is resistance?
The opposition to flow of electrical current
