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Topic2:Electricity - Coggle Diagram
Topic2:Electricity
CIRCUIT ARRAGNEGMENTS
DIRECT CURRENT
current flows in one direction
SERIES CIRCUITS
current is constant R = R1 + R2
PARRALELL CIRCUITS
current is split between branches
potential difference across each branch is the same
ALTERNATING CURRENT
the direction of current flow continually changes
CURRENT
the rate of flow of charge
V = I R
measured in Amps
CHARGE
measured in coulombus
E = Q V
Q = I t
can only flow if there is a source of potential difference
NATIONAL GRID
POWER LINES
transports current at a very high voltage
higher voltage reduces energy loss
STEP DOWN TRANSFORMORS
voltage decreases
used between power lines and houses
STEP UP TRANSFORMERS
voltage increases
used between power stations and power lines
ELECTRICAL QUANTITES AND CONDUCTORS
CHARGE
measured in coulombus
can only flow if there is a source of potential difference
E = Q V
Q = I t
RESISTANCE
how hard it is for current to flow
measured in Ohms
POWER (W)
E = P t
measured in watts
rate of energy transfer
P = I2 R P= I V