How will you infer with the help of an experiment that the same current flows through every part of the circuit containing three resistors R1, R2 and R3 in series connected to a battery of V volts ? (b) Study the following circuit and find out : (i) Current in
we can connect voltmeter across each resistor
V = V1 + V2 + V3
I1 = current across resistor R1
I1 = V1/R1
similarly
I2 = current across resistor R2
I2= V2/R2
I3 = current across resistor R3
I3 = V3/R3
we will see that
I1 = I2 = I3
also it will be equal to V/(R1 + R2+R3)
The second question is incomplete so can't avail you answer.
I hope my answer helps. All the very best for your future endeavors!