Amaterial that allows current to travel through a circuit ? a device that uses a magnet to protect a circuit from current overloads ? a device that uses a metal strip that melts away when a current becomes overloaded a material that prevents current from moving through it easily CLEAR ALL 7 8 9 10 NEXT > REVIEV
The Correct Answer and Explanation is:
1. A material that allows current to travel through a circuit:
Answer: Conductor
2. A device that uses a magnet to protect a circuit from current overloads:
Answer: Circuit breaker
3. A device that uses a metal strip that melts away when a current becomes overloaded:
Answer: Fuse
4. A material that prevents current from moving through it easily:
Answer: Insulator
Explanation (Approx. 300 words):
In an electrical circuit, various materials and devices work together to ensure the safe and efficient flow of electric current.
A conductor is a material that allows electrical current to flow easily. Metals like copper and aluminum are common conductors because they have free electrons that can move easily through the material. Conductors are essential for building electrical circuits, as they connect components and carry the current between them.
A circuit breaker is a safety device that protects an electrical circuit from damage due to overload or short circuit. It uses an electromagnet or bimetallic strip that trips a switch to cut off the current when it exceeds a safe level. Unlike a fuse, a circuit breaker can be reset and used again. This makes it ideal for household and industrial applications.
A fuse is another protective device, but it works differently. It contains a thin metal wire or strip that melts when too much current flows through it. This breaks the circuit and stops the flow of electricity, preventing overheating or fires. Once a fuse blows, it must be replaced, unlike a circuit breaker.
An insulator is a material that does not allow current to flow easily. Rubber, plastic, glass, and wood are common insulators. These materials are used to coat wires and electrical tools, ensuring that the current stays within the conductors and does not cause harm to users or equipment.
Together, these materials and devices form the backbone of electrical safety and functionality, ensuring that power flows where and when it is needed—without causing harm.
