Drawing Circuits:

Circuit is an important part of a power supply, in order for electric current to flow.

Electrical Potential

Charge cannot flow on its own (its static)

When Charge flows through the load, its energy decreases. Thus, The power supply needs to increase the electrical potential energy (otherwise voltage).

One Volt is one joule of work rquired to move one cloumb of charge between 2 points

Electrical potential energy /C is called electrical potential difference/voltage

V = E / Q

V: Voltage (Volt / V)

E: Energy required (Joule / J)

Q: Charge (Couloumb / C)

Conventional current: (+) > (-) terminals

The amount of energy delivered to the load depends on the rate of flow (current), and potential energy per charge (voltage).

Equation: E = VIt

E : Energy (J) V : Voltage (V) I : Current (A) t : time (s)

Measuring Potential Difference

Voltmeter is used to measure volt (must be connected in parallel to the load)

(Must be less conductive, so only very little current is diverted from the circuit)