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Find out the… (Class 10 Science SQP 2025-26, Q34A)

questionbuddy.in/q/cbse-10-science-2025-26-sqp-q34a-out-electric-circuit

ScienceCBSE Class 10 · Sample paper, session 2025-26 · 2 marks · Case-based

CBSE Class 10 Science sample paper 2025-26: question 34(A)

From the official CBSE sample question paper for 2025-26, section C, question 34(A), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q34(A) · 2 marks · Case-basedCompetency-basedElectricity

Find out the following in the electric circuit given in the figure:

  1. (i)

    Effective resistance of two 8 ohm resistors in the combination.

    1 mark
  2. (ii)

    Current flowing through the 4-ohm resistor.

    1 mark

Figure in the paper: Circuit: 8 V battery connected from point A through a 4 Ω resistor to point B, then ammeter A1 (+ at B side, − at C side) to junction C. Between C and D are two 8 Ω resistors in parallel. From D, ammeter A2 (− at D side, + at E side) returns to the battery at E, completing the loop. See it in the official paper.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2025-26.

Hints

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

Hint 1

Two equal resistors in parallel give half of one resistor.

Hint 2

Add the series resistor, then use Ohm's law with the 8 V supply.

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) The two 8 Ω resistors are in parallel:

    1 mark

  2. (ii) The 4 Ω resistor is in series with :

  3. A. In series the same current flows through the 4 Ω resistor, so the current is 1 A.

    1 mark

Answer: (i) 4 Ω; (ii) 1 A

Where the marks are

  • Parallel combination = 4 Ω (1 mark)
  • Total 8 Ω and I = 1 A through the 4 Ω resistor (1 mark)

Revise the chapter

  • Chapter: Electricity (notes, formulas, where marks are lost and every past question)
  • Topic: Ohm's Law
Practise this chapterBoard-style questions from Electricity, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2025-26: 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.