(b) In case the two cells are identical each of emf E=5V and internal resistance r= 2Z calculate the voltage across the external resistance R=10E
Answers
Answer:
given = E = 5V emf
r = 2Z internl resistance
R = 10E external resistance
to find = voltage across the external resistance.
solution,
equvivalent EMF = E = E₂r₁ + E₁ r₂=(r₁ +r₂)
= 5 X 2 + 5 X 2 = (2+2 )
= 5
equvivalent internal resistance = r =
r₁r₂ = 2 X 2 = 4
(r₁ + r₂ ) = 2 + 2 = 4
r = 1
∴ equvivalent resistance of circuit
∴ R"= 10 + 1 = 11
∴ Current = I = E /R = 5 /11A
∴ voltage across R
∴ V = IR
∴ V = 5 X 1/ 11
∴ V = 50 / 11
∴V = 4.54 V
4.54V is a internal resistance across the external resistance R = 10E
Answer:
r = 4.54 V
Explanation:
given = E = 5V emf
r = 2Z internl resistance
R = 10E external resistance
to find = voltage across the external resistance.
solution,
equvivalent EMF = E = E₂r₁ + E₁ r₂=(r₁ +r₂)
= 5 X 2 + 5 X 2 = (2+2 )
= 5
equvivalent internal resistance = r =
r₁r₂ = 2 X 2 = 4
(r₁ + r₂ ) = 2 + 2 = 4
r = 1
∴ equvivalent resistance of circuit
∴ R"= 10 + 1 = 11
∴ Current = I = E /R = 5 /11A
∴ voltage across R
∴ V = IR
∴ V = 5 X 1/ 11
∴ V = 50 / 11
∴V = 4.54 V
4.54V is a internal resistance across the external resistance R = 10E