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Resistors in Series
Req = R1 + R2 + …
Resistors in Parallel
Req = 1/(R1-1 + R2-2)
Voltage Divider
Find voltage across one of two resistors in series.
Current Divider
Find current across one of two resistors in parallel.
Ampere-hours (Ah)
Unit for measuring storage capacity
Stored Energy
Stored charge x voltage
Internal Resistance
Model the decrease in voltage due to increasing current as this (in battery)
Lower Internal Resistance
Supplies a load current with lower voltage drop
Measure open circuit voltage
How to find the value of supply voltage (Vs) of battery
Measure Terminal Voltage
How to find the value of internal resistance (Rs) of battery
Power Transfer
Efficiently transferring energy from a source to a load
Efficiency
Pout/Pin
Energy Loss
Proportional to I2R
Reduce I and R
Reducing energy loss in a circuit
Efficiency = 50%
Maximised Pout