Know For Exam Flashcards
Law of Conservation of charge?
The net charge in an isolated system remains constant during a physical process
Current
The rate of flow of charge
Potential difference
Potential difference is the energy transferred per unit electric charge flowing through it
Resistance
The opposition of the flow of current
Why do batteries go flat
Chemical reaction takes place inside the battery which changes chemical potential energy into electrical potential energy
When all chemical potential energy has been transferred to the components of the circuits the battery is no longer able to supply current and therefore it is flat
Flat batteries also have a high internal resistance
A series circuit is a ….. divider
Voltage or potential difference divider
The … is the same in each resistor in series circuit
Current
The … is the same in each resistor in parallel circuit
Pd
Parallel circuits are ….. diveders
Current
Mole
This is the amount of substance that contains the same number of particles and 12 g of carbon 12
Mole
This is the amount of substance that contains the same number of particles and 12 g of carbon 12
Relative atomic mass
The mass of a particle on a scale one atom of carbon-12 has a mass of 12
Avogadro’s number
The number of particles present in 1 mole
Molar mass
The mass of one mole of substance measured in g.mol-¹
Molar volume
One mole of any gas occupies 22.4 dm³ at STP
Frame of reference
Frame of reference is a coordinate system used to measure and represents properties of objects such as position
One-dimensional motion
This is motion along a straight line either backwards or forwards
Position
the place where the object is located
Distance
The length of the path taken by the object
Displacement
The change in position
Average speed
The rate of change of distance with time
Average velocity
The rate of change of position
Acceleration
The rate of change of velocity
Positive acceleration
An object moves in a positive Direction with an increase in speed and an object moves in a negative Direction with a decrease in Speed
negative acceleration
An object moves in a positive Direction with a decrease in speed and an object moves in a negative Direction with an increase in Speed
Deceleration
Deceleration is when an object experiences a decrease in Speed but continues in the same direction
Uniform or constant acceleration
This is when the velocity remains constant
