Final answer:
The question about potential at point a in a circuit with a cube and cylinders lacks sufficient details for a solution; it's a physics problem that typically involves calculations of voltage, resistance, and circuit configuration.
Step-by-step explanation:
Unfortunately, the original question regarding a 10.0 V battery connected to a cube and two cylinders seems to have some missing or unclear details that are essential for solving the problem accurately. Without a clear circuit diagram or more context, it isn't possible to determine the potential at point a with the information provided alone.
The examples provided do not match the student's question but demonstrate typical types of physics calculations relevant to an understanding of circuits, electric potential, resistance, capacitance, and related concepts.