If voltage is present but no current flows, what might be the issue?

When voltage is present but no current flows, it indicates an open circuit. An open circuit is a condition where the path for current is broken or incomplete, preventing electricity from flowing. This could occur due to a switch being open, a break in a wire, or a faulty connection in a circuit.

In such cases, even though there is voltage across the terminals, without a continuous conductive path, the current cannot flow. This is a fundamental principle of electrical circuits, where voltage alone cannot cause current to move unless there is a complete loop for it to traverse.

Other scenarios, like high resistance, could also affect current flow, but they usually don't prevent it completely if there is sufficient voltage. Similarly, low voltage might not provide enough potential for the current to flow, but it wouldn’t explain the presence of voltage without current. A short circuit would typically allow current to flow freely, defeating the conditions described in the question. Thus, an open circuit clearly encapsulates the scenario of having voltage present without current flow.