Question

discuss series and parallel combinations of resistors with their salient features

Answer 1

Answer:

In series combination the equivalent resistance is increased because each resistances are added.So if we need to increase resistance we should use series combination. Parallel combination decreases the resistance. In series the potential difference may change at different points.In parallel voltage is constant.

Answer 2

Explanation:

In series combination

• The net resistance of the resistors in series would be greater than any individual resistance.
• Therefore the current passing through the circuit will decrease when resistors are connected in series.
• This is the reason why we connect a resistance in series for the conversion of a galvanometer into ammeter. (Voltmeter is protected from high ranges of current)

In parallel combination

• The net resistance of the resistors in parallel would be less than any individual resistance.
• Therefore the current passing through the circuit will increase when resistors are connected in parallel than when any any individual resistance is connected.
• This is the reason why we connect a shunt resistance in parallel for the conversion of galvanometer into ammeter.