Lesson 4: Battery Flashcards
This converts chemical energy to electrical energy where if ther is no conversion of energy, there is no electrical load.
Battery
E stands for?
Electromotive force
r stands for?
Internal resistance
What is the electromotive force (E) of the circuit if there is no load condition?
It is equal to the terminatal voltage.
Battery can be both?
A source and a load
Battery as a source means that?
The battery is discharging
Recharging battery means that?
The battery acts as a load
What is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field?
Potential Difference
In a Discharging Battery, how do we correct the sign convention of the assumed current direction?
Negate the answer as negating means opposing the direction of the potential difference
In a Discharging Battery, where is the direction of the current coming from?
From the EMF going to the load
In a Recharging Battery, where is the direction of the current coming from?
From the source going to the EMF
This is the miniature battery where it fills up the battery.
Cells
What do cells in series do?
Supply a load of higher voltage rating
How to solve for the total EMF with the same direction?
Add all individual emf
How to solve for the total EMF with one cell in a different direction?
Subtract it to other emf
Is adding all the individual internal resistances (r) will determine the total internal resistance?
Yes
What do cells in parallel do?
They connect in order to yield a higher current
How many cases whould we familarize with in solving for the cells in parallel?
3 cases
The first case of cells in parallel states that there should be the same E and same r. What will be the total E and r should be?
The total of E (or EMF) is equal to the given E and the total r is equal to r/(the number of internal resistances)
The second case of cells in parallel states that there are the same E but different r. What will be the total E and r should be?
The total of E (or EMF) is equal to the given E while the total r is equal to 1/(the sum of the reciprocal of internal resistances)
The third case of cells in parallel states that there are the different E and different r. What will be the total E and r should be?
balikan later
What is the rate per unit time at which electrical energy is transferred by an electric circuit?
Electric Power
It is the rate of doing work
Power
It is the time rate or absorbing energy
Power
It is the energy carried by moving electrons in an electric conductor
Electrical Energy
