Question

Draw the circuit diagram and determine the equivalent resistances
are connected parallel to each other.​

Answer 1

Draw circuit diagram of three resistances connected in series combination. Derive formula for equivalent resistance for this combination.

The diagram of three resistors connected in series combination is shown.

R 1,R 2 and R 3

are the three resistors.

I = electric current flowing through the circuit

V = the potential difference supplied by the battery

Applying the Ohm’s law to the entire circuit, we have

V=IR

On applying Ohm’s law to the three resistors separately, we further have

V 1=IR 1

V 2 =IR 2

and V 3 =IR 3

The total potential difference across a combination of resistors in series is equal to the sum of potential difference across the individual resistors.

That is,

V=V 1 +V 2 +V 3

Therefore, IR=IR 1 +IR 2+IR 3

or combination, R=R 1+R 2 +R 3

$bts (≧▽≦) exo$