Question

Calculate the current flowing through the resistor R₁ in the given circuit. R₁ = 10Ω, R₂ = 20Ω and R₃ = 30Ω The potentials of the points 1, 2 and 3 are respectively, V₁ = 10v. Calculate V₂ = 6v and V₃ = 5v. Calculate the potential at the junction.

Answer 1

Use the KVL and KCL at junction to get current followed by application of Ohm’s law to get value of resistance.

O the junction point in the above circuit (see figure). The potential at point 1, 2 and 3 is higher than the potential existing at points 2 and 3. Hence, the direction of the current is from point 1 to O, from O to 2 and from O to point 3. The figure indicates the electric current and their direction.