Series Circuit and Parallel Circuit Flashcards
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Comparing Resistances in
Series/Parallel/Combo Circuits
- In a series circuit, the more resistors with equal resistance in the circuit, the higher the effective resistance of the circuit.
- In a parallel circuit, the more resistors with equal resistance in the circuit, the lower the effective resistance of the circuit.
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7
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8
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9
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10
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11
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Finding Current in a Series Circuit
- In a series circuit, the current flow through each of the resistor is equal to the current flows through the whole circuit.
- Potential difference (V) across the whole circuit is equal to the e.m.f. (E) if the internal resistance is ignored.
- Effective resistance for the whole circuit = R1 + R2
- By Ohm’s Law
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12
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a.
Potential difference across the 2Ω resistor, V = 12V
Resistance, R =2Ω
b.
The current flows through the resistor
= the reading of the ammeter
= 6A
13
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a.
Potential difference across the 2 resistors, V = 12V
The equivalent resistance of the 2 resistors, R =6Ω
b.
The current flows through the resistors
= the reading of the ammeter
= 2A
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