Physics Chapter 5 Rules
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Parallel circuit Rules Components in a parallel circuit share the same voltage. E total = E 1 = E 2 = . . . E n Total resistance in a parallel circuit is less than any of the individual resistances. R total = 1 / (1/R 1 + 1/R 2 + . . . 1/R n ) Total current in a parallel circuit is equal to the sum of the individual branch currents. I total = I 1 + I 2 + . . . I n Series Circuit Rules Components in a series circuit share the same current. I total = I 1 = I 2 = . . . I n Total resistance in a series circuit is equal to the sum of the individual resistances, making it greater than any of the individual resistances. R total = R 1 + R 2 + . . . R n Total voltage in a series circuit is equal to the sum of the individual voltage drops. E total = E 1 + E 2 + . . . E n Emf Rules Emf = IR + Ir Power Supplied by cell, emfxI = I 2 R + I 2 r Terminal Pd, V = emf –Ir r= V 1−V 2 I 2−I 1 More Circuit Calculations Cell current = cell emf totalcircuit resistance
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A summary of aqa physics chapter 5 circuit rules
Transcript of Physics Chapter 5 Rules
Parallel circuit Rules Components in a parallel circuit share the same voltage. Etotal = E1 = E2 = . . . En Total resistance in a parallel circuit is less than any of the individual resistances. Rtotal = 1 / (1/R1 + 1/R2 + . . . 1/Rn) Total current in a parallel circuit is equal to the sum of the individual branch currents. Itotal = I1 + I2 + . . . InSeries Circuit Rules Components in a series circuit share the same current. Itotal = I1 = I2 = . . . In Total resistance in a series circuit is equal to the sum of the individual resistances, making it greater than any of the individual resistances. Rtotal = R1 + R2 + . . . Rn Total voltage in a series circuit is equal to the sum of the individual voltage drops. Etotal = E1 + E2 + . . . EnEmf Rules Emf = IR + Ir Power Supplied by cell, emfxI = I2R + I2r Terminal Pd, V = emf Ir r=More Circuit Calculations
Cell current =
Pd across each resistor in series with the cell = current x the resistance of each resistor
Current through each resistor = Circuits with identical cells in parallel
Current through each cell =
lost pd =
Terminal pd, V = emf - The Potential Divider
