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JEE Main Practice physics questions with solutions
Browse JEE Main Practice Physics questions with solutions. Useful for JEE, NEET, and school exam revision.
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- NumericmediumMixed Chapter
Find 10k where k is the area of the region x≥0, x+y≤3, x²≤4y and y≤1+√x.
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A square lamina has I = 20 kg·m² about the central perpendicular axis. Find its moment of inertia about an axis along an edge (kg·m²).
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A block starts from point C of a frictionless 37° incline AC of length 1 m. The inclined plane accelerates horizontally to the right with a₀=g. Find the time (s) taken for the block to reach A as drawn. Use g=10 m/s².
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A 16 kg bomb at rest explodes into pieces of masses 4 kg and 12 kg. The 12 kg piece moves at 4 m/s. Find kinetic energy of 4 kg piece (J).
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An ideal gas obeys VP²=constant. Initially temperature T and volume V; when volume increases to 2V, temperature becomes √x·T. Find x.
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During an adiabatic compression of gas, 100 J of work is done ON the gas. Find change in internal energy (J).
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When a 2 kg car moving at 20 m s⁻¹ coasts freely its velocity follows v = 20/(1 + t/20) m s⁻¹. Find power required to maintain 10 m s⁻¹ on same road (W).
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Two equal circular loops of radius R form a figure-of-eight wire. Their planes are inclined at 120° and each carries current I. The resultant induction at the common intersection of the loop axes is (N μ₀I)/(48R). Determine N.
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A ray enters a spherical liquid drop from air at angle of incidence θ ≠ 0. The drop has refractive index μ = √3. It undergoes exactly one internal reflection (not total internal reflection) and emerges. For minimum total deviation, determine 12 sin²θ. [The source printed key is 9; independent optics gives 4.]
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On the P–V diagram, the gas performs 5 J of work during isothermal path a→b and 4 J during adiabatic path b→c. Find change in internal energy (J) along direct path c→a.
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