Question

Derive the formula of equivalent resistance when two resistors are connected in:
1. Series combination
2. Parallel combination

How will these formulas change for two equal resistors?

Answer 1

Answer:

1. Equivalent  Resistance will be R*R/R+R

2. Equivalent  Resistance will be 1/R1 + 1/R2, then take reciprocal.

Explanation:

Answer 2

Answer:

Explanation:

A circuit is said to be in a parallel connection when the resistors are connected in such a way that they branch out from one point. The potential difference in a parallel circuit is the same for each resistor and the current flow is not the same for all resistors. The total current flow through the circuit is calculated by summing up the current flow through each resistor. Parallel circuit connections find application in household electric distribution. The reason why a parallel circuit is preferred is to avoid short circuit and to monitor the flow of current for different devices. The other type of circuit is a series connection. Below is an experiment to determine the equivalent resistance when the resistors are connected parallel

I = I1+I2+I3+….