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Day 505: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Oscillations. Asked once: 15 Apr 2023

    2
    In a linear simple harmonic motion (SHM) (A) Restoring force is directly proportional to the displacement. (B) The acceleration and displacement are opposite in direction. (C) The velocity is maximum at mean position. (D) The acceleration is minimum at extreme points. Choose the correct answer from the options given below:

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  2. Question 2

    Ray Optics. Asked once: 29 Jan 2025

    23
    Two light beams fall on a transparent material block at point 1 and 2 with angle θ1\theta_{1} and θ2\theta_{2}, respectively, as shown in figure. After refraction, the beams intersect at point 3 which is exactly on the interface at other end of the block. Given : the distance between 1 and 2,d=43 cm2,d = 4\sqrt{3}\text{ }cm and θ1=θ2=cos⁡−1(n22n1)\theta_{1}=\theta_{2}=\cos^{- 1}\left( \frac{n_{2}}{2n_{1}} \right), where refractive index of the block n2>n_{2}> refractive index of the outside medium n1n_{1}, then the thickness of the block is_____ cm .

  3. Question 3

    Semiconductor Electronics. Asked once: 23 Jan 2026 S1

    12
    The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at VZ=5 VV_{Z}= 5\text{ }V and the desired current in load is 5 mA . The unregulated voltage source can supply upto 25 V . Considering the Zener diode can withstand four times of the load current, the value of resistor RSR_{S} (shown in circuit) should be ____\_\_\_\_ Ω\Omega.

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  4. Question 4

    System of Particles and Rotational Motion. Asked once: 21 Jan 2026 S1

    14
    A uniform rod of mass m and length ll suspended by means of two identical inextensible light strings as shown in figure. Tension in one string immediately after the other string is cut, is ____\_\_\_\_ . (g acceleration due to gravity)

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  5. Question 5

    Thermal Properties of Matter. Asked once: 14 Jun 2022

    104
    A 100 g100\text{ }g of iron nail is hit by a 1.5 kg1.5\text{ }kg hammer striking at a velocity of 60 ms−160{\text{ }ms}^{- 1}. What will be the rise in the temperature of the nail if one fourth of energy of the hammer goes into heating the nail? [Specific heat capacity of iron =0.42Jg−1 ∘C−1= 0.42Jg^{- 1}\ ^{\circ}C^{- 1} ]

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