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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. [1] medium thorough-understanding
Assertion (A): Connecting several household appliances in parallel across the mains is preferred over connecting them in series. Reason (R): In a parallel combination, the equivalent resistance decreases, allowing each appliance to receive the full supply voltage and draw the current it requires independently. Choose the correct option: (A) Both A and R are true and R is the correct explanation of A. (B) Both A and R are true but R is not the correct explanation of A. (C) A is true but R is false. (D) A is false but R is true.
  1. A Both A and R are true and R is the correct explanation of A.
  2. B Both A and R are true but R is not the correct explanation of A.
  3. C A is true but R is false.
  4. D A is false but R is true.
Generated by claude-sonnet-4-6 · 2026-06-26 01:12 · grounding rag
Model Answer

(A) Both A and R are true and R is the correct explanation of A.

In parallel combination, each appliance gets the full supply voltage and operates independently; equivalent resistance decreases, allowing each device to draw its required current.

Explanation

The textbook (section 11.6.2) explicitly states that in a parallel circuit, the potential difference across each gadget is the same (full supply voltage), each draws its own required current independently, and the total equivalent resistance decreases. Both the Assertion and the Reason are correct, and R directly explains why parallel connection is preferred — making option (A) the right choice.

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