JEE Mains 2017 physics questions with solutions

Showing 1–10 of 15 questions

• MCQmediumElectromagnetic Induction

  In a coil of resistance 100 Ω, current is induced by changing magnetic flux as shown in the graph. Find the magnitude of the change in flux through the coil.

  

  Options

  • Option A

    250 Wb

  • Option B

    275 Wb

  • Option C

    200 Wb

  • Option D

    225 Wb

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• MCQmediumCapacitor

  In the given circuit, after the current reaches steady state, the charge on the capacitor of capacitance C is:

  

  Options

  • Option A

    CE·r₂/(r+r₂)

  • Option B

    CE·r₁/(r₁+r)

  • Option C

    CE

  • Option D

    CE·r₁/(r₂+r)

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• MCQmediumMagnetic effect of current

  A magnetic needle of magnetic moment 6.7 × 10⁻² Am² and moment of inertia 7.5 × 10⁻⁶ kg m² is performing simple harmonic oscillations in a magnetic field of 0.01 T. Time taken for 10 complete oscillations is :

  Options

  • Option A

    6.98 s

  • Option B

    8.76 s

  • Option C

    6.65 s

  • Option D

    8.89 s

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• MCQmediumAtomic Structure and X-rays

  For an X-ray tube, plot log λₘᵢₙ versus log V, where V is the accelerating potential and λₘᵢₙ is the cut-off wavelength. Which graph is correct? Image

  Options

  • Option A

    Image 1

  • Option B

    Image 2

  • Option C

    Image 3

  • Option D

    Image 4

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• MCQmediumGeometrical opticslens and combination lens,silvered lens

  A diverging lens with magnitude of focal length 25 cm is placed at a distance of 15 cm from a converging lens of magnitude of focal length 20 cm. A beam of parallel light falls on the diverging lens. The final image formed is:

  Options

  • Option A

    real and at a distance of 40 cm from the divergent lens

  • Option B

    real and at a distance of 6 cm from the convergent lens

  • Option C

    real and at a distance of 40 cm from convergent lens

  • Option D

    virtual and at a distance of 40 cm from convergent lens.

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• MCQmediumSimple Harmonic Motion

  A particle executes SHM with time period T and starts from the equilibrium position at t = 0. Which graph correctly represents its kinetic energy versus time?

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQmediumElectrostatic

  An electric dipole has fixed dipole moment 𝐩 making angle θ with the x-axis. In the electric field $\vec{E_1}$= E$\hat{i}$, it experiences torque $\vec{T_1}$= τ$\hat{k}$. In another field $\vec{E_2}$= √3E$\hat{j}$, it experiences torque $\vec{T_2}$= -$\vec{T_1}$. Find θ.

  Options

  • Option A

    60°

  • Option B

    90°

  • Option C

    30°

  • Option D

    45°

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• MCQmediumCapacitor

  A capacitance of 2 µF is required in an electrical circuit across a potential difference of 1.0 kV. A large number of 1 µF capacitors are available which can withstand a potential difference of not more than 300 V. The minimum number of capacitors required to achieve this is :

  Options

  • Option A

    24

  • Option B

    32

  • Option C

    2

  • Option D

    16

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• MCQmediumRotational Motionmoment of inertia and kinetic energy in pure rotation

  The moment of inertia of a uniform cylinder of length l and radius R about its perpendicular bisector is I. What is the ratio l/R such that the moment of inertia is minimum ?

  Options

  • Option A

    1

  • Option B

    3/√2

  • Option C

    √(3/2)

  • Option D

    √3/2

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• MCQmediumWave Motion

  An observer moves toward a stationary microwave source with speed c/2. The source frequency is 10 GHz. What frequency does the observer measure? Take c = 3 × 10⁸ m s⁻¹.

  Options

  • Option A

    15.3 GHz

  • Option B

    10.1 GHz

  • Option C

    12.1 GHz

  • Option D

    17.3 GHz

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