(i) All the appliances are connected in parallel.
(ii) The live wire in the domestic circuit has green insulation on it.
(iii) A fuse connected to the circuit allows excessive current to pass through the appliances.
(iv) The neutral wire in the domestic circuits has black insulation on it.
Both (i) and (iv)
Domestic Circuit Analysis
We need to evaluate each statement regarding domestic circuits to determine which are true.
Statement Evaluation
- (i) All the appliances are connected in parallel. This statement is true. In domestic wiring, appliances are connected in parallel across the main voltage supply. This ensures each appliance receives the standard voltage (e.g., 220V) and can be operated independently without affecting others.
- (ii) The live wire in the domestic circuit has green insulation on it. This statement is false. The live wire typically has red or brown insulation. Green insulation is conventionally used for the earth wire, which is a safety measure.
- (iii) A fuse connected to the circuit allows excessive current to pass through the appliances. This statement is false. A fuse is a safety device designed to protect appliances. It contains a wire that melts and breaks the circuit when the current exceeds a predetermined safe limit, thereby stopping the flow of excessive current.
- (iv) The neutral wire in the domestic circuits has black insulation on it. This statement is true. The neutral wire commonly has black or blue insulation. It completes the circuit by providing a return path for the current.
Conclusion
Based on the analysis, statements (i) and (iv) are true. Therefore, the correct option includes both (i) and (iv).
Important Questions from Current Electricity
_______ is a simple device that is used to either break the electric circuit, or to complete it.
When the material is cooled down under its critical temperature, which of the superconductor attains accidentally zero?
The most commonly used electrical conductor is-
The gas usually filled in the electric bulb is
_________ is the physical quantity of the substance which is numerically equal to the resistance of a rod of that substance which is 1 m long and 1 sq m in cross-section.
