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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [3] medium thorough-understanding
In a domestic electric circuit, all the appliances — bulbs, fans, electric press — are connected in parallel with each other. Why is this arrangement used instead of a series connection?
Generated by claude-sonnet-4-6 · 2026-06-26 01:12 · grounding rag
Model Answer

Parallel connection is preferred over series connection in domestic circuits for the following reasons:

  1. Equal voltage: Each appliance gets the same potential difference (220 V) as required for proper functioning. In series, voltage gets divided.
  1. Independent operation: Each appliance has its own switch, so it can be turned ON/OFF independently without affecting others. In series, all appliances would stop if one fails.
  1. Different current ratings: Appliances of different power ratings draw their required current independently, which is not possible in a series circuit.

Source: Chapter 12, Section 12.4 — Domestic Electric Circuits

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Explanation

The examiner expects three distinct reasons, one per mark. The key phrase from the textbook is: "In order that each appliance has equal potential difference, they are connected parallel to each other." Always include: (i) equal voltage, (ii) independent working, and (iii) different power ratings/current. Avoid vague answers — name the advantage clearly and contrast with series where relevant.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.