Question

Study the following circuit and
find the potential difference across 4 ohm resistor ​

Answer 1

First we need to find the equivalent resistance

as.both the resistors are in series

Rs=3+4=7 ohms

Now find the current in the circuit,

I=V/R=3/7=0.42A

We know that ,

the current through each resistor is the same in series combination

I=0.42

R1=3

V1=0.42×3=1.26V

I=O.42

R2=4

V2=4×0.42=1.68V

I hope this helps ( ╹▽╹ )