Question

question 19 1 pts
which of the following can cause a short circuit?
when there is no resistor in the circuit.
when the battery runs out of electricity
when the insulation around a wire is worn or frayed
when a wire breaks

Explanation:

A short circuit occurs when current flows along an unintended path with very low resistance, bypassing the intended load.

• A circuit without a resistor is just a direct connection, but this is a deliberate low-resistance path, not an accidental short.
• A dead battery cannot supply current, so it cannot cause a short circuit.
• Worn/frayed wire insulation allows the conductive parts of wires (or wires and other conductive surfaces) to touch, creating an unintended low-resistance path for current, which causes a short circuit.
• A broken wire creates an open circuit, stopping current flow entirely, not a short.

Answer:

When the insulation around a wire is worn or frayed