Household electricity

Question 1

describe

• Describe how household circuits are set up.

Answer 1

A typical circuit in your home has two conductors: hot and neutral.

Question 2

explain

• Explain how fuses work.

Answer 2

The fuse breaks the circuit if a fault in an appliance causes too much current to flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

Question 3

explain

• Explain how to choose the right fuse.

Answer 3

Selecting the right fuse rating is crucial for both protecting the circuit and preventing damage to the components, The following factors must be considered while selecting: 1- The circuit’s normal operating current & and equipment nameplate rating current (fuse rating should be higher)

Question 4

explain

• Explain how circuit breakers work.

Answer 4

By definition a circuit breaker is an electrical safety device, a switch that automatically interrupts the current of an overloaded electric circuit, ground faults, or short circuits. Circuit breakers “trip”, shut off, current flow after protective relays detect a fault.

Question 5

explain

• Explain how electrochemical cells work.

Answer 5

An electrochemical cell splits the oxidant and reductant in a manner that allows electrons to flow through an external circuit from the reductant (which gets oxidized) to the oxidant (which causes reduction) while preventing them from physically touching each other.