11 April 2023 physics questions with solutions

Showing 1–10 of 58 questions

• IntegermediumCapacitorcapacitor circuit theory and charge flow problem

  In the capacitor network shown, C₁ = 2 μF, C₂ = 0.2 μF, C₃ = 2 μF, C₄ = 4 μF, C₅ = 2 μF and C₆ = 2 μF. The charge on C₄ is ______ μC.

  

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  JEE Mains11 April 2023Shift 2Evening Shift

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• MCQeasyCurrent electricityCells, Maximum Power & Heating Effect

  Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in the same time, parallel : series, is:

  Options

  • Option A

    1 : 2

  • Option B

    4 : 1

  • Option C

    1 : 4

  • Option D

    2 : 1

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• IntegermediumRotational Motionangular momentum in pure rotation and its conservation

  A solid sphere of mass 500 g and radius 5 cm rotates about a diameter with angular speed 10 rad s⁻¹. If its moment of inertia about a tangent is x × 10⁻² times its angular momentum about the diameter, find x.

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• IntegereasyRotational Motionangular momentum in pure rotation and its conservation

  A horizontal circular plate rotates with angular speed ω. A person at the centre stretches out two dumbbells, making the system's moment of inertia triple. If initial kinetic energy is E and final kinetic energy is E/x, find x.

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• MCQeasyElectromagnetic wavedisplacement current and properties of electromagnetic wave

  A plane electromagnetic wave propagates along +x. At a point, E = 6.6 ĵ V m⁻¹. The magnetic field at that point is:

  Options

  • Option A

    -2.2 × 10⁻⁸ k̂ T

  • Option B

    -2.2 × 10⁻⁸ î T

  • Option C

    2.2 × 10⁻⁸ k̂ T

  • Option D

    2.2 × 10⁻⁸ î T

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• IntegermediumGeometrical opticslens and combination lens,silvered lens

  A symmetric convex lens has refractive index 1.8 and each surface radius 20 cm. It is immersed in a liquid of refractive index 1.5. If P(air):P(liquid) = x:1, find x.

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• MCQeasyKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  A projectile is projected at 30° with speed 40 m s⁻¹. Its velocity magnitude at t = 2 s is: (g = 10 m s⁻²)

  Options

  • Option A

    Zero

  • Option B

    20√3 m s⁻¹

  • Option C

    40√3 m s⁻¹

  • Option D

    20 m s⁻¹

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• MCQmediumThermodynamicsheat and principle of calorimeter

  On a linear temperature scale X, water freezes at -15°X and boils at 65°X. The Fahrenheit temperature corresponding to -95°X is:

  Options

  • Option A

    -63°F

  • Option B

    -148°F

  • Option C

    -48°F

  • Option D

    -112°F

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• MCQeasyAtomic Structure and X-raysatomic structure and bohr atomic model

  The energy of He⁺ in its first excited state is, given hydrogen ground-state energy -13.6 eV:

  Options

  • Option A

    -13.6 eV

  • Option B

    -54.4 eV

  • Option C

    -27.2 eV

  • Option D

    -3.4 eV

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• MCQmediumUnit dimension and errorDimension and its application

  If force F, velocity V and time T are fundamental quantities, the dimensional formula of density is:

  Options

  • Option A

    FV⁻²T²

  • Option B

    FV⁴T⁻⁶

  • Option C

    FV⁻⁴T⁻²

  • Option D

    F²V⁻²T⁶

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