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DC circuits
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Last edited time @October 1, 2023 9:19 AM
Circuit rules
Current rules
There are rules that current obeys when it follows in a circuit. These are
described below.
1. At any function in a circuit, the total current leaving the junction is equal
to the total current entering the junction. This is shown in the diagram
below where wire 3 has 1A flowing into the junction. The same also
applies to charge, Q.
2. Components in Series
Current entering a component is the same as the current leaving the
component.
The current passing through two or more components is the same.
Current is constant in a series circuit. This is because the flow of
charge is the same at any point time.
Potential difference rules
If the charge carriers lose energy, the potential difference is a potential
drop
DC circuits 1
, If the charge carriers gain energy, i.e.. through a cell, the potential
difference is a potential rise equal to the potential difference battery.
1. For two or more components in series, the total potential difference of
the circuit is equal to the sum of the potential difference in each
component.
2. The potential difference across components in parallel is the same.
3. For any complete loop of a circuit, the sum of the emf’s round the loop is
equal to the sum of the potential drops around the loop.
DC circuits 2
DC circuits
Tags Done
Last edited time @October 1, 2023 9:19 AM
Circuit rules
Current rules
There are rules that current obeys when it follows in a circuit. These are
described below.
1. At any function in a circuit, the total current leaving the junction is equal
to the total current entering the junction. This is shown in the diagram
below where wire 3 has 1A flowing into the junction. The same also
applies to charge, Q.
2. Components in Series
Current entering a component is the same as the current leaving the
component.
The current passing through two or more components is the same.
Current is constant in a series circuit. This is because the flow of
charge is the same at any point time.
Potential difference rules
If the charge carriers lose energy, the potential difference is a potential
drop
DC circuits 1
, If the charge carriers gain energy, i.e.. through a cell, the potential
difference is a potential rise equal to the potential difference battery.
1. For two or more components in series, the total potential difference of
the circuit is equal to the sum of the potential difference in each
component.
2. The potential difference across components in parallel is the same.
3. For any complete loop of a circuit, the sum of the emf’s round the loop is
equal to the sum of the potential drops around the loop.
DC circuits 2
