Physics 2011 JAMB Past Questions - Question 38: In homes electrical appliances and lamps are connected in parallel because

Correct Answer

A

Explanation

In homes, electrical appliances and lamps are connected in parallel because it allows each device to operate independently. When devices are connected in parallel, they are connected to the same voltage source but have their own separate paths for current to flow. This means that if one device fails or is turned off, it does not affect the operation of the other devices connected in parallel. Additionally, each device can be controlled individually, allowing for greater flexibility and convenience in using different appliances and lamps throughout the home.

Electrical appliances and lamps are connected in parallel in homes for several important reasons:

1. Independent Operation: When devices are connected in parallel, each device operates independently. If one device is turned on or off, it doesn't affect the operation of other devices connected in the same circuit. This is important in a home where you want the flexibility to use different appliances and lights at different times without impacting the others.

2. Voltage Remains Constant: In a parallel circuit, the voltage across each device remains constant. This ensures that devices receive the appropriate voltage they need to operate correctly, preventing dimming of lights or fluctuations in the performance of appliances when other devices are turned on or off.

3. Safety: Parallel circuits are safer because if one device or component in the circuit fails or encounters a fault, it doesn't affect the operation of other devices. In contrast, in a series circuit, if one device fails, the entire circuit is interrupted, potentially causing a safety hazard.

4. Ease of Wiring: Parallel wiring is simpler and more convenient in homes. It allows for a neater and more organized electrical installation, as each device is connected to a common voltage source and a common neutral wire without the need for daisy-chaining through multiple devices.

5. Energy Efficiency: Parallel connections do not add resistance in the same way that series connections do. This means that the appliances receive the full voltage, which helps them operate efficiently and with less power loss. In contrast, in a series circuit, the voltage is divided among the devices, potentially leading to inefficient operation.

In summary, connecting electrical appliances and lamps in parallel is the preferred method in homes because it provides independent operation, maintains a constant voltage, enhances safety, simplifies wiring, and promotes energy efficiency.