Questions:

1. What is short circuit? What is the common cause of unintentional short circuits in electrical devices?
2. What is a fuse? What happens when you blow a fuse?
3. How do Circuit breakers Work?
4. When is there an overload in a circuit?
5. Why will too many electrical devices operating at one time often blow a fuse?
6. What are the danges of short circuit and overload?
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1.short circuit --(sometimes abbreviated to short or s/c) allows a charge to flow along a different path from the one intended. The electrical opposite of a short circuit is an open circuit, which is infinite resistance between two nodes. It is common to misuse "short circuit" to describe any electrical malfunction, regardless of the actual problem.In electrical devices, unintentional short circuits are usually caused when a wire's insulation breaks down, or when another conducting material is introduced, allowing charge to flow along a different path than the one intended.In electrical devices, unintentional short circuits are usually caused when a wire's insulation breaks down, or when another conducting material is introduced, allowing charge to flow along a different path than the one intended.
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2.Fuse --is a type of overcurrent protection device. Its essential component is a metal wire or strip that melts when too much current flows. When the metal strip melts, it opens the circuit of which it's a part, and so protects the circuit from excessive current.When the fuse element blows, the indicating pin extends to activate the micro switch or relay which in turn triggers an event.

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3.The circuit breaker is an absolutely essential device in the modern world, and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem. Without circuit breakers (or the alternative, fuses), household electricity would be impractical because of the potential for fires and other mayhem resulting from simple wiring problems and equipment failures.

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4.An electrical overload is a situation where the wiring to or within a machine or system is subjected to a greater electric current load than it was designed to carry, leading to excessive heating of the wires and a possibility of fire. This excessive current load can be a result of electrical insulation failure ( a short circuit) or human error. A correctly designed electrical system incorporates suitable overload protection devices to prevent damage should such a situation occur.; )

Margie R. Manuel
Lou Jean Geñoso lV-Dove

5.In an electrical overload,it leads to excessive heating of the wires and a possiblity of fire.In a short circuit,an accidental low resistance connection between two nodes of an elewctrical circuit that are meant to be at different voltages. This results in an electric current limited only by the Thevenin equivalent resistance of the rest of the network and potentially causes circuit damage, overheating,fire or explosion.Although usually the result of a fault, there are cases where short circuits are caused intentionally, for example, for the purpose of voltage-sensing crowbar circuit protectors.

6.The dangers of short circuit are it can cause fires which can damage things and will even caused lives. It can cause so much trouble to the family and community. It will destroy appliances in the house and will ruin properties because of the fire it caused.We should really try our best to avoid short circuit and overload by maintainig our appliances at constant state and provide it a better care so that in the end we will not suffer the consequences of it.rest of the network and potentially causes circuit damage, overheating, fire or explosion. Although usually the result of a fault, there are cases where short circuits are caused intentionally, for example, for the purpose of voltage-sensing crowbar circuit protectors.