Final answer:
The flow of electrical current in a wire can cause resistance, heating, and hazards including electric shocks and fires. Ohm's Law states that current is proportional to voltage applied across a wire, shaping how electricity behaves in conductive materials. Overloading wires may result in overheating, hence thermal hazards, while electric current can also create shock hazards.
Step-by-step explanation:
The flow of electrical current in a wire can cause several effects, including heating, resistance, and even hazards like fires and electric shock. When electrical current flows through a conductor such as a wire, it encounters various obstacles, including electrons, atoms, and impurities, which collectively create resistance. According to Ohm's Law, the current flowing through most substances is directly proportional to the voltage applied, and this is expressed mathematically as I=V/R where I is the current, V is the voltage, and R is the resistance. Overloaded wires may lead to thermal hazards as they overheat, potentially causing fire risks. Furthermore, electric current can pose shock hazards to individuals, ranging from minor injuries to life-threatening conditions such as ventricular fibrillation.