Question

In order to complete the circuit, which devices are connected in parallel and in series to the resistor combination and why? Draw a circuit diagram to find equivalent resistance of two resistors R1 and R2 connected in parallel.

Answer 1

Answer:

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

R1 ,R2and R3

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

V1 =IR1

V2=IR2

and V3=IR3

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=V1 +V2 +V3

Therefore, IR=IR

1+IR2 +IR3

or

Equivalent resistance of the combination, R=R1+R2 +R3