# Current Electricity

### Description

This mind map outlines the main topics in current electricity. These include potential difference, capacitance, electric currents and domestic circuits. It is aimed at a leaving certificate student or someone who has an interest in learning more about current electricity.
Mind Map by tatemae.honne, updated more than 1 year ago More Less
 Created by alex.examtime9373 almost 10 years ago Copied by tatemae.honne almost 10 years ago
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## Resource summary

Current Electricity
1. Potential Difference
1. A.K.A Voltage
1. Volt
1. Scalar quantity
1. V = W/Q
1. W = work
1. Q = charge
2. Electromotive force (emf)
1. A voltage that is applied to a circuit
3. Capacitance
1. Electrical device that stores electric charge
1. C = εA/d
1. ε = permittivity
1. A = common area
1. d = distance between plates
2. Energy stored in a capacitor
1. W = (1/2)CV²
2. Capacitors conduct A.C. but not D.C.
3. Electric current (I)
1. Flow of electric charge
1. Scalar quantity
1. Ampere (A)
1. Q = It
1. Q = charge
1. I = current
1. t = time
2. Ammeter
1. Effects
1. Chemical
1. Magnetic
1. Heating
2. Joule's Law
1. P = I²R
1. P = power
1. I = current
1. R = resistance
2. Domestic circuits
1. Plugs
1. Live wire
1. Neutral wire
1. Earth wire
1. Two-pin plugs
1. Do not need to be earthed
2. Fuses
1. Wire that will melt when current above a certain size passes through it
2. Miniature circuit breakers
1. Prevent electrocution or fire
2. Residual current devices
3. kilowatt-hour (kWh)
1. Energy (in kWh) = Power (in kW) x time (in h)
1. Amount of energy used by a 1,000 watt appliance in one hour

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