when resistors are connected in series, the effective resistance is increases. Why ?

When resistors are connected in parallel the effective resistance is reduced. Why ?

When two resistors are connected in series, their effective resistance is 80 Omega . When : they are connected in parallel, their effective resistance is 20 Omega . What are the values of the two resistances?

When two resistors are connected In series, the effective resistance is 5 Omega . When they are connected In parallel, resistance is 6//5 Omega . Find the Individual resistances.

True or False. When resistors are connected in Series, the effective resistance is less than each of the individual resistances.

When two 2Omega resistors are connected in series, the effective resistance is . . . . . . . .. .

If two resistors connected in parallel, the effective resistance of the combination is 21 Omega . If the same two resistors are connected in series, the effective resistance of the combination is 100 Omega . Find the resistances of the individual resistors.