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Day 425: JEE Mains Physics

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

  1. Question 1

    Current Electricity. Asked once: 2021 Paper 26 (same type asked 9 times) See all 9 of this type

    15
    A wire of 1Ω1\Omega has a length of 1 m1\text{ }m. It is stretched till its length increases by 25%25\%. The percentage change in a resistance to the nearest integer is:

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  2. Question 2

    Wave Optics. Asked once: 2021 Paper 3 (same type asked 8 times) See all 8 of this type

    19
    Two coherent light sources having intensity in the ratio 2x2x produce an interference pattern. The ratio Imax⁡−Imin⁡Imax⁡+Imin⁡\frac{I_{\max}-I_{\min}}{I_{\max}+I_{\min}} will be :

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  3. Question 3

    Units and Measurements. Asked once: 28 Jan 2025 (same type asked 20 times) See all 20 of this type

    78
    Match List-I with List-II.
    List-IList-II
    (A) Angular Impulse(I) [M0L2T−2]\left\lbrack M^{0}L^{2}T^{-2} \right\rbrack
    (B) Latent Heat(II) [ML2T−3A−1]\left\lbrack ML^{2}T^{-3}A^{-1} \right\rbrack
    (C) Electrical resistivity(III) [ML2T−1]\left\lbrack ML^{2}T^{-1} \right\rbrack
    (D) Electromotive force(IV) [ML3T−3A−2]\left\lbrack ML^{3}T^{-3}A^{-2} \right\rbrack
    Choose the correct answer from the options given below :

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  4. Question 4

    Gravitation. Asked once: 2021 Paper 24 (same type asked 14 times) See all 14 of this type

    23
    Two satellites revolve around a planet in coplanar circular orbits in anticlockwise direction. Their period of revolutions are 1 hour and 8 hours respectively. The radius of the orbit of nearer satellite is 2×103 km2 \times10^{3}\text{ }km. The angular speed of the farther satellite as observed from the nearer satellite at the instant when both the satellites are closest is πx rad h−1\frac{\pi}{x}\ \text{rad h}^{- 1} where xx is .....

  5. Question 5

    Electrostatics. Asked once: 28 Jun 2022 (same type asked 12 times) See all 12 of this type

    116
    A capacitor C1C_{1} of capacitance 5μF5\mu F is charged to a potential of 30 V30\text{ }V using a battery. The battery is then removed and the charged capacitor is connected to an uncharged capacitor C2C_{2} of capacitance 10μF10\mu F as shown in figure. When the switch is closed charge flows between the capacitors. At equilibrium, the charge on the capacitor C2C_{2} is μC\mu C.