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Day 604: JEE Mains Physics

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

  1. Question 1

    Current Electricity. Asked once: 27 Jan 2024

    18
    A wire of length 10 cm10\text{ }cm and radius 7×10−4 m\sqrt{7}\times10^{- 4}\text{ }m connected across the right gap of a meter bridge. When a resistance of 4.5Ω4.5\Omega is connected on the left gap by using a resistance box, the balance length is found to be at 60 cm60\text{ }cm from the left end. If the resistivity of the wire is R×10−7ΩmR \times10^{- 7}\Omega m, then value of RR is:

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  2. Question 2

    Electrostatics. Asked once: 6 Apr 2023

    113
    As shown in the figure, two parallel plate capacitors having equal plate area of 200 cm2200{\text{ }cm}^{2} are joined in such a way that a≠ba \neq b. The equivalent capacitance of the combination is x∈0 Fx \in_{0}\text{ }F. The value of xx is___

  3. Question 3

    Motion in a Plane. Asked once: 2021 Paper 5

    19
    A block of 200 g200\text{ }g mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius 20 cm20\text{ }cm. If the block takes 40 s40\text{ }s to complete one round, the normal force by the side walls of the groove is:

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  4. Question 4

    Ray Optics. Asked once: 2021 Paper 16

    16
    Two prisms P1P_{1} and P2P_{2} whose refractive index as a function of wavelength λ\lambda are μ1\mu_{1} and μ2\mu_{2} respectively where μ1=1.2+10.8×10−14λ2\mu_{1}= 1.2 +\frac{10.8 \times10^{- 14}}{\lambda^{2}} and μ2=1.45+1.8×10−14λ2\mu_{2}= 1.45 +\frac{1.8 \times10^{- 14}}{\lambda^{2}}. Find λ\lambda for which when P1P_{1} and P2P_{2} are put together, no deviation of light happened in the contact surface. Assume both the prism are thin, and both having refracting angle A=4∘A =4^{\circ}

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  5. Question 5

    Semiconductor Electronics. Asked once: 11 Apr 2023

    5
    The logic performed by the circuit shown in figure is equivalent to:

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