In domestic electric circuits the wiring with 15 A current rating is for the electric devices which have
In domestic electric circuits the wiring with 15 A current rating is for the electric devices which have
Options
The correct option is (a).
Marking Scheme
- 11 mark for selecting option (a) with correct reasoning regarding power ratings and current draw.
Hint
Think about which appliances draw more current and require thicker wires with higher current capacity (like geysers or air conditioners) versus those that run on very low current (like fans or bulbs).
Quick Oral Answer
A 15 A current rating circuit is used for high-power appliances like geysers, air conditioners, and electric ovens because they draw a large amount of current, which would melt or damage a standard 5 A circuit.
Analysis & Explanation
In domestic electric circuits, power is supplied through two distinct current-carrying circuits to ensure safety and efficiency:
- A circuit with a 15 A current rating is specifically designed for electrical appliances that have higher power ratings (such as geysers, air conditioners, and electric ovens) because they draw a larger current from the mains.
- A circuit with a 5 A current rating is used for appliances with lower power ratings (such as bulbs, tube lights, and fans) which draw very little current.
Why other options are incorrect:
- Option (b) is incorrect because appliances with lower power ratings like fans only require a 5 A circuit.
- Options (c) and (d) are incorrect because the current rating of a circuit is determined by the power consumption (current drawn) of the device, not by whether its body is metallic or non-metallic. (While metallic bodies require an earth wire for safety, this is independent of the 15 A rating itself).
Common Mistakes
- 1Students often confuse the current rating (15 A vs 5 A) with the safety grounding requirement for metallic bodies, leading them to incorrectly choose option (c).
Interesting Facts
In India, domestic power is supplied at a frequency of and a potential difference of .
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 1 mark in the CBSE Class 10 Science 2023 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Magnetic Effects of Electric Current" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Domestic Electric Circuits" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.