What are the advantages of connecting electrical devices in parallel with the battery instead of connected them in series ?

Which electrical elements are connected in series ?

Which electrical elements are connected in series

When bulbs are connected to the same source, the brightness of bulb connected in parallel is "________" then the brightness of identical bulbs connected in series.

Three identical condensers are connected together in four different ways. First all of them are connected in series and the equivalent capacity is C_(1) . Next all of them are connected in parallel and the equivalent capacity is C_(2) . Next two of them are connected in series and the third one connected in parallel to the combination and the equivalent capacity is C_(3) . Next two of them are connected in parallel and the third one connected in series with the combination and the equivalent capacity is C_(4) . Which of the following is correct ascending order of yhe equivalent capacities ?

Why is ammeter connected in series and voltmeter in parallel in the circuit?

Two identical parallel plate capacitors are connected in parallel to a3 volt battery. The battery is disconnected and the two capacitors are joined in series, Fig. What is the potentail difference between A and B ?