Question

1. The circuit below contains five identical light bulbs. And we decide that we want to cut only one wire. What would happen to the brightness of the emboldened bulb if we chose to cut the wire at Point A? What about Point B? Point C? Point D? Point E? mC

Answer 1

Point A

The bulb will go off as the circuit is cut open.

Point B

Brightness will decrease as a parallel path of resistors is cut and it increases the overall circuit resistance thereby reducing the current passing through the emboldened bulb.

Point C

Brightness will decrease.

Earlier point C was providing a short circuit path and so the resistor(bulb) parallel to it was by passed but now it is included.

Point D

The bulb will be cut off.

Cutting point D puts the emboldened bulb in open circuit.

Point E

The brightness will increase as more current passes.