Physics - Electric Circuits

Current (I)

Ampere (A)

Charge (Q)

Coulumb (C)

Energy (E)

Joule (J)

Resistance (R)

Ohm (Ω)

Time (t)

Second (s)

Voltage / potential difference (V)

Volt (V)

Power (P)

Watt (W)

Parallel circuit

A closed circuit where electrical components are connected along multiple, separate branches, allowing the current to take different paths

Series circuit

An electrical circuit where components are connected end-to-end in a single path, providing only one route for current to flow

Investigation to test how current varies with voltage

Set a circuit up for each component plus and ammeter and voltmeter, set the voltage to the same for each and measure how the amps differ for each component

What happens when you increase the resistance of a circuit?

The current of the circuit decreases

What can be used to indicate the presences of current in a circuit?

Lamps and LEDs

Equation for voltage

voltage = current x resistance V = I x R

Current

The rate of flow of charge

Equation for charge

Charge = current x time Q = I x T

What is the electric current in solid metallic conductors?

A flow of negatively charged ions

Where is current conserved and why?

At a junction because charge is conserved

Rule of voltage in parallel

Voltage of across two components connected in parallel is the same

What is Voltage?

The energy transferred per unit charge passed

Equation for energy transferred

Energy transferred = charge x voltage E = Q x V

Resistor

Bulb

Diode

Temperature

As temperature increase,

Resistance of the thermistor decreases. TURD. (Same for light intensity. LURD)