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Day 98: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Waves. Asked 2 times: 25 Jan 2023, 29 Jan 2024 See all 2 times it was asked

    10
    Match List I with List II
    List IList II
    A. ∮B→⋅dl→=μ0ic+μ0ε0dϕEdt\oint \overrightarrow{B}\cdot\overrightarrow{dl}=\mu_{0}i_{c}+\mu_{0}\varepsilon_{0}\frac{d\phi_{E}}{dt}I. Gauss' law for electricity
    B. ∮E→⋅dl→=−dϕBdt\oint \overrightarrow{E}\cdot\overrightarrow{dl}=-\frac{d\phi_{B}}{dt}II. Gauss' law for magnetism
    C. ∮E→⋅dA→=Qε0\oint \overrightarrow{E}\cdot\overrightarrow{dA}=\frac{Q}{\varepsilon_{0}}III. Faraday law
    D. ∮B→⋅dA→=0\oint \overrightarrow{B}\cdot\overrightarrow{dA}= 0IV. Ampere Maxwell law
    Choose the correct answer from the options given below

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  2. Question 2

    Motion in a Plane. Asked 2 times: 29 Jan 2023*, 29 Jan 2024 (* = numbers or wording changed that year) See all 2 times it was asked

    119
    A particle is moving in a circle of radius 50 cm50\text{ }cm in such a way that at any instant the normal and tangential components of its acceleration are equal. If its speed at t=0t = 0 is 4 m/s4\text{ }m/s, the time taken to complete the first revolution will be 1α[1−e−2π]s\frac{1}{\alpha}\left\lbrack 1 -e^{- 2\pi} \right\rbrack s, where α=\alpha= ______

  3. Question 3

    Thermodynamics. Asked 2 times: 29 Jul 2022*, 29 Jan 2024 (* = numbers or wording changed that year) See all 2 times it was asked

    16
    A thermodynamic system is taken from an original state A to an intermediate state B by a linear process as shown in the figure. It's volume is then reduced to the original value from BB to CC by an isobaric process. The total work done by the gas from AA to BB and BB to CC would be:

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  4. Question 4

    Atoms. Asked 2 times: 31 Jan 2023*, 27 Jan 2024 (* = numbers or wording changed that year) See all 2 times it was asked

    11
    The radius of third stationary orbit of electron for Bohr's atom is RR. The radius of fourth stationary orbit will be:

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  5. Question 5

    Motion in a Straight Line. Asked 2 times: 27 Jul 2022*, 27 Jan 2024 (* = numbers or wording changed that year) See all 2 times it was asked

    110
    A bullet is fired into a fixed target loses one third of its velocity after travelling 4 cm. It penetrates further D×10−3 mD \times10^{- 3}\text{ }m before coming to rest. The value of DD is:

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