# Electricity Flashcards

What is the equation for energy transferred?

E = V x Q Energy transferred = Voltage x Charge or E = V x I x t Energy transferred = Voltage x Current x Time

What is the equation for potential difference?

V = W / Q Voltage = Work Done / Charge

What is the unit for charge?

Coulombs

What is the unit for work done?

Joules (J)

What is Ohms Law?

V = I x R

What is the equation for charge?

Q = I x t Charge = Current x Time

What is the rule for CURRENT in a SERIES circuit?

Current is the SAME everywhere in the circuit.

I1 = I2 = I3

What is the rule for VOLTAGE (or P.D.) in a SERIES circuit?

The voltages of all the components ADD UP to the voltage of the battery.

V Battery = V1 + V2 + V3

What is the rule for CURRENT in a PARALLEL circuit?

The current in each branch ADDS UP to form the total current going in and out of the battery.

I Total = I1 + I2 + I3

What is the rule about VOLTAGE (or P.D.) in a PARALLEL circuit?

The voltage of each branch is the SAME as the battery voltage.

V Battery = V1 = V2 = V3

What is the rule about RESISTANCE in a SERIES circuit?

Total resistance is equal to the resistance of all the components ADDED UP.

R T = R1 + R2 + R3

What is the rule about RESISTANCE in a PARALLEL circuit?

1/RT = 1/R1 + 1/R2 + 1/R3

How can you tell if a graph is directly proportional?

The line is straight and goes through the origin.

What does a directly proportional V/I graph tell you about a component?

It is an Ohmic resistor.

What is current?

The flow of charge (electrons).