Skip to content

Consider the following… (Science 2024 31/4/1 Q13)

questionbuddy.in/q/cbse-10-science-2024-31-4-1-q13-consider-combinations-resistors-combinations-having

ScienceCBSE Class 10 · Board exam 2024, set 31/4/1 · 1 mark · MCQ

CBSE Class 10 Science 2024: question 13

Set in the CBSE Class 10 board exam of 2024, paper 31/4/1, section A, question 13, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q13 · 1 mark · MCQElectricity

Consider the following combinations of resistors :

The combinations having equivalent resistance is/are :

  1. (A)I and IV
  2. (B)Only IV
  3. (C)I and II
  4. (D)I, II and III

Figure in the paper: Four resistor combinations labelled I, II, III and IV. I: two 2 Ω resistors connected in parallel. II: three 3 Ω resistors connected in parallel. III: a 2 Ω and a 4 Ω resistor in series in one branch, in parallel with a branch containing two 3 Ω resistors in series. IV: two 0.5 Ω resistors connected in parallel. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/4/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

For identical resistors in parallel, .

Hint 2

In III, add each branch in series first.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. I: . II: .

    1 mark

  2. III: . IV: . So only I and II give .

Answer: (C) I and II

Where the marks are

  • Calculates each equivalent resistance and picks I and II (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Electricity, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 31/4/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.