Day 566: JEE Mains Physics

Motion in a Straight Line. Asked once: 29 Jul 2022

Ray Optics. Asked once: 25 Jan 2023

118

An object is placed on the principal axis of convex lens of focal length $10\text{ }cm$ as shown. A plane mirror is placed on the other side of lens at a distance of $20\text{ }cm$. The image produced by the plane mirror is $5\text{ }cm$ inside the mirror. The distance of the object from the lens is $\_\_\_\_$ $cm$.

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Semiconductor Electronics. Asked once: 23 Jan 2025

91

What is the current through the battery in the circuit shown below?

1. A.
   1.0 A
2. B.
   1.5 A
3. C.
   0.5 A
4. D.
   0.25 A

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System of Particles and Rotational Motion. Asked once: 30 Jan 2023

111

A uniform disc of mass $0.5\text{ }kg$ and radius $r$ is projected with velocity $18\text{ }m/s$ at $t = 0\text{ }s$ on a rough horizontal surface. It starts off with a purely sliding motion at $t = 0\text{ }s$. After $2\text{ }s$ it acquires a purely rolling motion (see figure). The total kinetic energy of the disc after $2\text{ }s$ will be $\_\_\_\_$ J (given, coefficient of friction is 0.3 and $g = 10\text{ }m/s^{2}$ ).

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Thermodynamics. Asked once: 2021 Paper 12

8

Find work done in the process $A\rightarrow B$ (isothermal) by gas?

1. A.
   $100\ln2$
2. B.
   $- 100\ln2$
3. C.
   $200\ln2$
4. D.
   $- 200\ln2$

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