PYQ Vault
EbooksTutor

Day 421: JEE Mains Physics

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

  1. Question 1

    Wave Optics. Asked once: 30 Jan 2023 (same type asked 8 times) See all 8 of this type

    119
    In a Young's double slit experiment, the intensities at two points, for the path differences λ4\frac{\lambda}{4} and λ3(λ\frac{\lambda}{3}(\lambda being the wavelength of light used) are I1I_{1} and I2I_{2} respectively. If I0I_{0} denotes the intensity produced by each one of the individual slits, then I1+I2I0=________\frac{I_{1}+I_{2}}{I_{0}}= \_\_\_\_\_\_\_\_

  2. Question 2

    Ray Optics. Asked once: 8 Apr 2023 (same type asked 8 times) See all 8 of this type

    119
    Two transparent media having refractive indices 1.0 and 1.5 are separated by a spherical refracting surface of radius of curvature 30 cm30\text{ }cm. The centre of curvature of surface is towards denser medium and a point object is placed on the principle axis in rarer medium at a distance of 15 cm15\text{ }cm from the pole of the surface. The distance of image from the pole of the surface is___ cmcm.

  3. Question 3

    Units and Measurements. Asked once: 2021 Paper 7 (same type asked 8 times) See all 8 of this type

    7
    The vernier scale used for measurement has a positive zero error of 0.2 mm0.2\text{ }mm. If while taking a measurement it was noted that ' 0 ' on the vernier scale lies between 8.5 cm8.5\text{ }cm and 8.6 cm8.6\text{ }cm, vernier coincidence is 6 , then the correct value of measurement is ____ cm\_\_\_\_\ cm. (least count =0.01 cm= 0.01\text{ }cm )

    Tap an option to check your answer.

  4. Question 4

    Gravitation. Asked once: 14 Jun 2022 (same type asked 8 times) See all 8 of this type

    10
    The approximate height from the surface of earth at which the weight of the body becomes 13\frac{1}{3} of its weight on the surface of earth is : [Radius of earth R=6400 kmR = 6400\text{ }km and 3=1.732]\sqrt{3}= 1.732\rbrack

    Tap an option to check your answer.

  5. Question 5

    Units and Measurements. Asked once: 2021 Paper 3 (same type asked 8 times) See all 8 of this type

    14
    The pitch of the screw gauge is 1 mm1\text{ }mm and there are 100 divisions on the circular scale. When nothing is put in between the jaws, the zero of the circular scale lies 8 divisions below the reference line. When a wire is placed between the jaws, the first linear scale division is clearly visible while 72nd 72^{\text{nd~}} division on circular scale coincides with the reference line. The radius of the wire is :

    Tap an option to check your answer.