Question

How will you infer with the help of an experiment that same current flows through every part of a circuit containing three resistors in series connected to a battery?

Answer 1

Connect an ammeter in the circuit and three voltmeter across each resistance as shown in figure. Note the reading of ammeter let us say it is 

(i).  Note the reading of voltmeters let us say they are V₁, V₂ and V₃ respectively across R₁, R₂ and R₃. Now by ohm’s law

We will find that i₁ = i₂ = i₃ = i.

Hence same current flows through every part of the circuit.