Which circuit is brighter ?

Circuit A

Explanation:

Let voltage of one battery be V

The circuit at the top has an overall voltage of

Circuit A is in series which means the overall voltage is

Circuit B is the same as Circuit C where both are parallel to the bulb.

The overall voltage is

Circuit D will not work as the negative terminal of the battery are touching one another thus it impedes the electron flow in the circuit

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

he . if i may ask what i your question exactly?

explanation: