Class CBSE Class 12 Mathematics Applications of Integrals Q #637
KNOWLEDGE BASED
APPLY
1 Marks 2025 AISSCE(Board Exam) MCQ SINGLE
The area of the region bounded by the curve \(y^{2}=x\) between \(x=0\) and \(x=1\) is:
(A) \(\frac{3}{2}\) sq units
(B) \(\frac{2}{3}\) sq units
(C) 3 sq units
(D) \(\frac{4}{3}\) sq units
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Correct Answer: B
Explanation
**Correct Option if MCQ:** B
**Reasoning:**
* \(y = \sqrt{x}\)
* Area = \(\int_{0}^{1} \sqrt{x} dx\)
* Area = \([\frac{2}{3}x^{\frac{3}{2}}]_{0}^{1} = \frac{2}{3}\)

AI Tutor Explanation

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Step-by-Step Solution

The area of the region bounded by the curve \(y^2 = x\) between \(x = 0\) and \(x = 1\) can be found by integrating the function \(y = \sqrt{x}\) with respect to \(x\) from 0 to 1 and then multiplying by 2 because the curve is symmetric about the x-axis.

Step 1: Find the integral of \(y = \sqrt{x}\) with respect to \(x\).

\(\int \sqrt{x} \, dx = \int x^{\frac{1}{2}} \, dx = \frac{x^{\frac{3}{2}}}{\frac{3}{2}} + C = \frac{2}{3}x^{\frac{3}{2}} + C\)

Step 2: Evaluate the definite integral from \(x = 0\) to \(x = 1\).

\(\int_{0}^{1} \sqrt{x} \, dx = \left[ \frac{2}{3}x^{\frac{3}{2}} \right]_{0}^{1} = \frac{2}{3}(1^{\frac{3}{2}}) - \frac{2}{3}(0^{\frac{3}{2}}) = \frac{2}{3}(1) - \frac{2}{3}(0) = \frac{2}{3}\)

Step 3: Multiply the result by 2 to account for the area below the x-axis (due to the symmetry of \(y^2 = x\)).

Area = \(2 \times \frac{2}{3} = \frac{4}{3}\)

Correct Answer: \(\frac{4}{3}\)

Pedagogical Audit
Bloom's Analysis: This is an APPLY question because it requires students to apply the concept of definite integrals to calculate the area under a curve. They must select and use the appropriate formula and perform the necessary calculations.
Knowledge Dimension: PROCEDURAL
Justification: The question requires the student to apply a specific procedure (integration) to find the area. It involves knowing the steps to set up and solve a definite integral.
Syllabus Audit: In the context of CBSE Class 12, this is classified as KNOWLEDGE. The question directly tests the student's knowledge of applying integration to find the area under a curve, a standard topic covered in the textbook.
AI Suggestion: Option D

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