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4.8 / (1.2 + R) = 3

4.8 = 3 (1.2 + R)

4.8 = 3.6 + 3R

1.2 = 3R

0.4 ohm = R

Q: A 4.8 V battery cell delivers a current of 3 A through an external resistance of 1.2 Ohms Calculate the internal resistance in Ohms?

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Internal resistance is approximately equal to 94.667

unit of internal resistasnce is ohms too. V = I(R+r) V voltage across the circuit I current in the circuit R external resistance r internal resistance unit of internal resistasnce is ohms too. V = I(R+r) V voltage across the circuit I current in the circuit R external resistance r internal resistance

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As the source impedance is equal to load impedance, it is assumed that both the resistances are in series. This distributes the whole voltage equally between both the impedance. Hence the PD across external resistance will be 1V.

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Internal resistance is approximately equal to 94.667

Internal resistance equals external resistance when the load connected to a battery consumes power equal to that dissipated in the battery's internal resistance. This occurs when the open circuit voltage of the battery drops to zero.

unit of internal resistasnce is ohms too. V = I(R+r) V voltage across the circuit I current in the circuit R external resistance r internal resistance unit of internal resistasnce is ohms too. V = I(R+r) V voltage across the circuit I current in the circuit R external resistance r internal resistance

011.1

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As the source impedance is equal to load impedance, it is assumed that both the resistances are in series. This distributes the whole voltage equally between both the impedance. Hence the PD across external resistance will be 1V.

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