Resistance in series and parallel

The resistance of the four arms of a Wheatstone bridge are P= 10Omega , Q = 100Omega , R= 40Omega and S =10Omega . What resistance in series or parallel with the last one will be required to obtain no deflection in the galvanometer?

Combination of Resistance |Series and Parallel connection

Combination OF Resistance || Series & Parallel Combination || Wheatstone Bridge

Five identical cells each of internal resistance 1 Omega and emf 5V are connected in series and in parallel with an external resistance 'R' . For what value of 'R', current in series and parallel combination will remain the same ?

You are given three equal resistors. How many resistances can be obtained by joining them in series and parallel grouping ?

Two batteries each of E and internal resistance r are connected turen by turn in series and in parallel, and areused to find current in an external resistance R . If the current in series is equal to that in parallel, the internal resistance of each battery is

(a) Why does resistance increase in a series combination of resistors ? (b) Why does resistance decrease in a parallel combination of resistors ?

Two identical calls send the same current in 2 Omega resistance, whether connected in series of in parallel. The internal resistance of the cell should be