Ch09 A-level Physics CIE
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12 Terms
Kirchhoff's first law
the sum of currents entering any point is equal to the sum of the currents leaving that point
Kirchhoff's first law is another way of stating the conservation of...
charge
Kirchhoff's second law
the sum of emfs around any loop is equal to the sum of pds around that loop
Kirchhoff's second law is another way of stating the conservation of...
energy
When using Kirchhoff's second law, the emf counts as positive if it is ...
trying to make the current flow in the same direction as our loop
When using Kirchhoff's second law, the potential difference counts as positive if...
the current is flowing the same direction as our loop
The equation for the total resistance of several resistors in series
R total = R1 + R2 + ...
When deriving the equation for resistors in series, what is always the same for each resistor?
current
When deriving the equation for resistors in series, what might be different for each resistor?
pd
The equation for the total resistance of several resistors in parallel
1/R total = 1/R1 + 1/R2 + ....
When deriving the equation for resistors in parallel, what is always the same for each resistor?
pd
When deriving the equation for resistors in parallel, what might be different for each resistor?
current
