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Day 186: JEE Mains Physics

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

  1. Question 1

    Electrostatics. Asked once: 25 Jan 2023 (same type asked 4 times) See all 4 of this type

    21
    A uniform electric field of 10 N/C10\text{ }N/C is created between two parallel charged plates (as shown in figure). An electron enters the field symmetrically between the plates with a kinetic energy 0.5eV0.5eV. The length of each plate is 10 cm10\text{ }cm. The angle (θ)(\theta) of deviation of the path of electron as it comes out of the field is ___(in degree).

  2. Question 2

    Electrostatics. Asked once: 4 Apr 2024 (same type asked 4 times) See all 4 of this type

    113
    A parallel plate capacitor of capacitance 12.5pF12.5pF is charged by a battery connected between its plates to potential difference of 12.0 V12.0\text{ }V. The battery is now disconnected and a dielectric slab (ϵr=6)\left( \epsilon_{r}= 6 \right) is inserted between the plates. The change in its potential energy after inserting the dielectric slab is ________ ×10−12 J\times10^{- 12}\text{ }J

  3. Question 3

    Moving Charges and Magnetism. Asked once: 8 Apr 2024 (same type asked 4 times) See all 4 of this type

    22
    An electron with kinetic energy 5eV5eV enters a region of uniform magnetic field of 3μT3\mu T perpendicular to its direction. An electric field EE is applied perpendicular to the direction of velocity and magnetic field. The value of E, so that electron moves along the same path, is ________ NC−1NC^{- 1}. (Given, mass of electron =9×10−31 kg= 9 \times10^{- 31}\text{ }kg, electric charge =1.6×10−19C= 1.6 \times10^{- 19}C )

  4. Question 4

    Laws of Motion. Asked once: 6 Apr 2024 (same type asked 4 times) See all 4 of this type

    15
    A light string passing over a smooth light pulley connects two blocks of masses m1m_{1} and m2m_{2} (where m2>m1m_{2}>m_{1} ). If the acceleration of the system is g2\frac{g}{\sqrt{2}}, then the ratio of the masses m1 m2\frac{m_{1}}{{\text{ }m}_{2}} is :

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  5. Question 5

    Mechanical Properties of Solids. Asked once: 6 Apr 2023 (same type asked 4 times) See all 4 of this type

    27
    A steel rod has a radius of 20 mm20\text{ }mm. A force of 62.8kN62.8kN stretches it along its length. Young's modulus of steel is 2.0×10112.0 \times10^{11} N/m2N/m^{2}. The longitudinal strain produced in the wire is ___×10−5\_\_\_\times10^{- 5}