JEE Advanced 2023 physics questions with solutions

Showing 1–10 of 25 questions

• MCQdifficultGeometrical opticslens and combination lens,silvered lens

  An optical arrangement consists of two concave mirrors M₁ and M₂, and a convex lens L with a common principal axis, as shown in the figure. The focal length of L is 10 cm. The radii of curvature of M₁ and M₂ are 20 cm and 24 cm, respectively. The distance between L and M₂ is 20 cm. A point object S is placed at the mid-point between L and M₂ on the axis. When the distance between L and M₁ is n/7 cm, one of the images coincides with S. The value of n is _________

  

  Options

  • Option A

    80 only

  • Option B

    150 only

  • Option C

    80 or 150 or 220

  • Option D

    220 only

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• MCQmediumThermodynamics

  An ideal gas is in thermodynamic equilibrium. If a molecule has n degrees of freedom, let U(n) be the internal energy of one mole and v(n) be the speed of sound at fixed temperature and pressure. Which option is correct?

  Options

  • Option A

    v₃ < v₆ and U₃ > U₆

  • Option B

    v₅ > v₃ and U₃ > U₅

  • Option C

    v₅ > v₇ and U₅ < U₇

  • Option D

    v₆ < v₇ and U₆ < U₇

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• MCQmediumCapacitor

  A container has base 50 cm × 5 cm and height 50 cm. Two opposite conducting walls each have area 50 cm × 50 cm; the other walls are thin and non-conducting. A liquid of dielectric constant 3 is poured in at 250 cm³ s⁻¹. Find the capacitance after 10 s. Use ε₀ = 9×10⁻¹² C² N⁻¹ m⁻² and neglect the non-conducting walls.

  

  Options

  • Option A

    27 pF

  • Option B

    63 pF

  • Option C

    81 pF

  • Option D

    135 pF

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• NumericmediumSimple Harmonic Motionphysical pendulam and torsional pendulam ,combination of shm

  Two point-like objects of masses 20 gm and 30 gm are fixed at the two ends of a rigid massless rod of length 10 cm. This system is suspended vertically from a rigid ceiling using a thin wire attached to its center of mass, as shown in the figure. The resulting torsional pendulum undergoes small oscillations. The torsional constant of the wire is 1.2 × 10⁻⁸ N m rad⁻¹. The angular frequency of the oscillations is n × 10⁻³ rad s⁻¹. The value of n is [enter value].

  

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• Multi-correctmediumCapacitor

  In the shown circuit, capacitor C is initially uncharged and key K is open. In this condition, a current of 1 A flows through the 1 Ω resistor. The key is closed at t = t₀. Select the correct statements. Given e⁻¹ = 0.36.

  

  Select all that apply

  • Option A

    R = 3 Ω

  • Option B

    For t < t₀, I₁ = 2 A

  • Option C

    At t = t₀ + 7.2 µs, the capacitor current is 0.6 A

  • Option D

    As t → ∞, charge on the capacitor is 12 µC

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• NumericmediumNuclear physics

  Two radioactive sources S₁ and S₂ have equal activity at t=0. Later, S₁ and S₂ have just completed 3 and 7 half-lives, respectively. Find A₁/A₂.

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• MCQmediumProperties of solid and fluid

  Young's modulus of elasticity Y is expressed in terms of three derived quantities, namely, the gravitational constant G, Planck's constant h and the speed of light c, as Y = cα hβ Gγ . Which of the following is the correct option ?

  Options

  • Option A

    α = 7, β = -1, γ = -2

  • Option B

    α = -7, β = -1, γ = -2

  • Option C

    α = 7, β = -1, γ = 2

  • Option D

    α = -7, β = 1, γ = -2

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• MCQdifficultGeometrical opticslens and combination lens,silvered lens

  In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0.1 cm and the distance of its real image from the lens is 20 ± 0.2 cm. The error in the determination of focal length of the lens is n %. The value of n is __________

  Options

  • Option A

    2

  • Option B

    0

  • Option C

    4

  • Option D

    1

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• ParagraphmediumWave Motion

  S₁ and S₂ are identical sound sources of frequency 656 Hz. S₁ is at O. S₂ moves anticlockwise with speed 4√2 m s⁻¹ on a circular path about O. P and R are diametrically opposite and Q is midway on the arc as shown; a detector is at P. Speed of sound is 324 m s⁻¹.

  

  Sub-question 1

  When only S₂ is emitting sound and it is Q, the frequency of sound measured by the detector in Hz is [blank].

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  Sub-question 2

  Consider both sources emitting sound. When S₂ is at R and S₁ approaches the detector with a speed 4 m s⁻¹,the beat frequency measured by the detector is [blank]Hz.

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• MCQmediumThermodynamics

  One mole of an ideal gas starts at temperature T₁ and volume V₀ and expands adiabatically to a common final state at temperature T₃ and volume 5V₀. Another mole of the same gas starts at temperature T₂ and volume V₀ and expands isothermally to the same final state. If γ=Cₚ/Cᵥ, find T₁/T₂.

  Options

  • Option A

    $5^{\gamma-1}$

  • Option B

    $5^{1-\gamma}$

  • Option C

    $5^{\gamma}$

  • Option D

    $5^{1+\gamma}$

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