Question

If three resistance are connect in series established formula of equivalent resistance for combination

Answer 1

Req= R1+R2+R3 is the required formula

Answer 2

If three resistance are connect in series established formula of equivalent resistance for combination .

Answer :

Let the three resistances be R₁ , R₂ and R₃ .

Let the equivalent resistance be R .

R = R₁ + R₂ + R₃

Proof :

We know that V = I R

V = V₁ + V₂ + V₃

This is because the voltage gets divided .

= > I R = IR₁ + IR₂ + IR₃

= > I R = I ( R₁ + R₂ + R₃ )

= > R = R₁ + R₂ + R₃

The current remains same in circuit .