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2395065
Current, voltage and resistance
Description
Mind Map on Current, voltage and resistance, created by Ellie Harvey on 28/03/2015.
Mind Map by
Ellie Harvey
, updated more than 1 year ago
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Created by
Ellie Harvey
over 9 years ago
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Resource summary
Current, voltage and resistance
charge and current
electric current is the rate of flow of electric charge.
no current can flow if the circuit is broken.
an electric current flows when electrons move through a conductor.
calculating current
current = charge / time in seconds
current (I) is measured in A
Charge (Q) is measured in C
time is measured in s
resistance
increases as - length of wire increases, thickness of wire decreases
Voltage = current x resistance
V = I x R
Voltage is measured in V
current is measured in A
resistance is measured in ohms
calculating energy transferred
energy transferred = potential difference x charge
E = V x Q
energy is measured in J
potential difference is measured in V
charge is measured in C
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