Energy and Electricity
- Created by: Eesha Dev
- Created on: 26-06-15 21:16
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Electric Current in Circuits
- current is the flow of charge around a circuit
- the charge is the electrons (negative)
- protons (positive) cannot move
- electrons in a circuit move from positive to negative
- current is NOT used up
- electric current is measured in Amperes (A)
Electric Current in Series Circuits
- current flows through the compartments and back to battery. As it passes through it gives energy to the light bulbs
- current is the same anywhere in the circuit as it has no choice of route
- current will stop flowing if there is a break in circuit
Electric Current in Parallel CIrcuits
- current flows through the components but can choose where to go (branches)
- the current splits at the junctions
- readings on ammeter are different but add up to reading on top branch
- current still flows if there is a break in the circuit
Measuring Electric Current
- a cell provides energy to power circuit
- chemical energy in cell changes to electrical energy
- electrical energy is carried to bulb by charges
- flow of charge is called electric current
- light bulb transfers electrical energy to light and thermal energy
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