3: Equations Flashcards Preview

A Level Physics OCR B > 3: Equations > Flashcards

Flashcards in 3: Equations Deck (6)
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1
Q

EMF equations (3)

A

Ɛ = V + v
Ɛ = I(R+r)
V=Ɛ - Ir

Ɛ = EMF (V)
V = Terminal p.d (V)
v = lost volts (V)
I = current (A)
R = Load Resistance
r = Internal resistance
2
Q

EMF in series

A

Ɛₜₒₜₐₗ = Ɛ₁ + Ɛ₂ + Ɛ₃ + …

3
Q

EMF in parallel

A

Ɛₜₒₜₐₗ = Ɛ₁ = Ɛ₂ = Ɛ₃ = …

4
Q

Total current entering a junction =

A

Total current leaving it

5
Q

Total EMF around a series circuit =

A

The sum of the pd.s across each component

6
Q

Which R is which in the equation:

Vₒᵤₜ = Vᵢₙ * R₂ / (R₁+R₂)

A

R₂ is the resistor you are measuring p.d (have the voltmeter) across