PHYS - Series vs. Parallel Electric Circuits
Physics, electricity, parallel, series - IBDP | DSE | GCE | IAL | AP Physics
For IGCSE Physics, you should be able to compare series and parallel electrical circuits 😁
When a circuit is connected in series, electrical components are connected next to each other in a single loop.
Two lamps connected in series looks like this 👇
When a circuit is connected in parallel, electrical components are connected to each other, forming another loop.
Two lamps connected in parallel looks like this 👇
20 lamps are connected in series with a 9 V supply.
(a) What is the voltage across each lamp in the series circuit?
Since 9 V is shared across the 20 lamps, voltage across each lamp is equal to 9 / 20 = 0.45 V.
(b) Each lamp has a power of 1.5 W. Show that the current in the circuit is about 3 A.
P = VI
The current through each lamp is:
I = P / V
= 1.5 / 0.45
= 3.3 A
Since the same current flows through each lamp in a series circuit, the current in the circuit is about 3 A.
Frequently asked in IGCSE Physics 👉
What are some advantages and disadvantages of connecting lamps in parallel rather than in series?
Advantage of parallel circuit:
Disadvantage of parallel circuit:
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