Deduce the expression for the equivalent resistance of the two resistances `R_1`and `R_2` connected in series.

Obtain the expression for the equivalent resistance for 3 resistors connected in parallel and also write the expression of equivalent resistance for connection of' n' resistors.

What will be the equivalent resistance of n resistors each having resistance R when connected in series and parallel separately?

Write equation of equivalent resistance of n resistors connected in series.

For three resistors of different value connected in series obtain equation of equivalent resistance. From this write equation of n resistors connected in series.

Derive the formula of equivalent resistance of series combination of resistors.

Derive the formula of equivalent resistance of series combination of resistors.

Derive the equation of equivalent resistance of resistors connected in parallel.

Derive the equation of equivalent resistance of resistors connected in parallel.

What is called series connection of cell ? Derive equation of equivalent emf of two cell with emf epsilon_(1) and epsilon_(2) connected in series.

For the network of resistance shown in the figure the equivalent resistance of the network between the points A and B is 18 ohm. The value of unknown resistance R is :