The correct answer is: B. heavy current flow.
A short circuit is a dangerous electrical fault that occurs when two conductors of a circuit come into direct contact, allowing a large amount of current to flow. This can cause overheating, fires, and other damage.
The amount of current that flows through a circuit is determined by the voltage applied to the circuit and the resistance of the circuit. In a short circuit, the resistance is very low, so a large amount of current will flow. This can cause the circuit to overheat and catch fire.
To prevent short circuits, it is important to use proper electrical wiring and to avoid overloading circuits. It is also important to install circuit breakers and fuses to protect circuits from excessive current flow.
Here is a brief explanation of each option:
- Option A: No current flow. This is not a characteristic of a short circuit. In a short circuit, a large amount of current flows.
- Option B: Heavy current flow. This is the correct answer. In a short circuit, a large amount of current flows.
- Option C: Voltage drop. This is not a characteristic of a short circuit. In a short circuit, the voltage across the circuit is very low.
- Option D: Voltage rise. This is not a characteristic of a short circuit. In a short circuit, the voltage across the circuit is very low.