Define effective resistance of a number of resistors connected in a series or parallel combination

What is the effective resistance of resistors connected in series.

Answer the following question: Obtain an expression for the effective resistance when a number of resistors are connected in parallel.

Answer the following question: Obtain an expression for the effective resistance when a number of resistors are connected in series.

Derive an expression for the effective resistance when three resistors are connected in (i) series (ii) parallel.

What is the effective resistance when two or more resistors are connected in parallel?

Obtain an expression for equivalent resistance of two resistors connected in a series combination.

What is the effective resistance when two or more resistors are connected in series?

In an electrical circuit resistances can be connected in series or parallel or combination of both.If R_1 and R_2 are two resistors connected in series what is their effective resistance.

n resistors, each of resistance R are first connected in series and then in parallel. What is the ratio of the total effective resistance of the circuit in the series to the parallel combination?