Question

1. describe the advantage of a parallel circuit and explain why we use it at our home. (2)

1. a battery is made of two different types of metal and a ( ).

the more metal will release and becomes the side of a battery. the less metal will receive and becomes the side of a battery. (9)

1. state what are the functions of the following electrical components. (6)

light bulb
resistor
diode
fuse
ammeter
voltmeter

Explanation:

The questions cover fundamental concepts in introductory physics and electrical engineering.

• Question 6 addresses parallel circuits, where components are connected along multiple paths, ensuring independent operation and constant voltage across each branch, which is ideal for household wiring.
• Question 7 describes the electrochemical principles of a simple galvanic cell (battery), where oxidation occurs at the more reactive metal (anode/negative terminal) releasing electrons, and reduction occurs at the less reactive metal (cathode/positive terminal) receiving electrons through an electrolyte.
• Question 8 defines the standard functions of basic passive and active electronic components, as well as electrical measurement instruments.

Answer:

1. An advantage of a parallel circuit is that each electrical appliance can be operated independently; if one component breaks or is switched off, the other components in the circuit continue to function. We use it at home so that turning off or breaking one appliance (like a light bulb) does not shut down all other appliances in the house.

1. A battery is made of two different types of metal and a chemical solution (electrolyte). The more reactive metal will release electrons and becomes the negative side of a battery. The less reactive metal will receive electrons and becomes the positive side of a battery.

8.

• Light bulb: Converts electrical energy into light (and heat) energy to provide illumination.
• Resistor: Limits or regulates the flow of electrical current in a circuit.
• Diode: Allows electric current to flow in only one direction.
• Fuse: Protects a circuit from excessive current by melting and breaking the circuit when the current exceeds a safe level.
• Ammeter: Measures the electric current flowing through a circuit.
• Voltmeter: Measures the electrical potential difference (voltage) between two points in a circuit.