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JEE Main 2025 (Online) 28th January Evening Shift
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JEE Main 2025 (Online) 28th January Evening Shift Physics - Magnetic Properties of Matter Question 5 English

A bar magnet has total length $2 l=20$ units and the field point P is at a distance $\mathrm{d}=10$ units from the centre of the magnet. If the relative uncertainty of length measurement is $1 \%$, then uncertainty of the magnetic field at point P is :

A

10%

B

5%

C

3%

D

4%

2
JEE Main 2025 (Online) 28th January Evening Shift
MCQ (Single Correct Answer)
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In a long glass tube, mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively, forms a convex refractive meniscus towards A . If an object placed at 13 cm from the vertex of the meniscus in A forms an image with a magnification of ${ }^{\prime}-2^{\prime}$ then the radius of curvature of meniscus is :
A

$ \frac{2}{3} \text{ cm} $

B

$ \frac{4}{3} \text{ cm} $

C

$ \frac{1}{3} \text{ cm} $

D

1 cm

3
JEE Main 2025 (Online) 28th January Evening Shift
MCQ (Single Correct Answer)
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The kinetic energy of translation of the molecules in 50 g of $ \text{CO}_2 $ gas at 17°C is :

A

4205.5 J

B

3582.7 J

C

3986.3 J

D

4102.8 J

4
JEE Main 2025 (Online) 28th January Evening Shift
MCQ (Single Correct Answer)
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A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water?

(Given: density of water = 1000 kg m-3)

A

400 cm3

B

600 cm3

C

1400 cm3

D

4000 cm3

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