Question

Q11 A closed circuit contains a source X of emf V volts connected with three resistors R₁, R₂ and R3.Assuming that these are the only resistances in the circuit, using Ohm's law and illustrating your answers with suitable diagrams, show that: a) If R₁, R₂ and R3 are connected in series with X, then the total resistance R in the circuit is given by:R = R₁ + R₂ + R3 b) If R₁, R₂ and R³3 are connected in parallel with X, then the total resistance R in the circuit is givenby:

c) Calculate the current / in the circuit as shown in Figure 1. Calculate the current passing through the 5 ohm resistor?

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