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

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )