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Which of the following is the correct value of π (Pi) to 3 decimal places?

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Qpt mathongo

Mathongo Paper-1 — Physics Section Marking Scheme: +4 for correct, −1 for wrong, 0 unattempted Q1. Given y = A sin[(ct - x)], where y and x are measured in metres. Which statement is true? A. Unit of A is same as that of x and A B. Unit of (ct - x) is same as that of (2π/λ) C. Unit of c is same as that of 2λ D. Unit of A is same as that of x but not of A Q2. Two trains moving in opposite directions are mistakenly put on the same track. When the trains are 300 m apart, they start slowing down. The separation when both have stopped is: A. 120 m B. 20 m C. 60 m D. 280 m Q3. A body is projected vertically upwards. The times for reaching a certain height during ascending and descending are t₁ and t₂ respectively. Velocity of projection is: A. g√(t₁t₂) B. (g t₁ t₂) / (t₁ + t₂) C. (g√(t₁t₂)) / 2 D. g(t₁ + t₂) / 2 Q4. Assertion: A stone and a feather dropped from the same height do not reach ground at the same time. Reason: g depends on mass...

Modern physics test

NUCLEAR PHYSICS – Chapter Test NUCLEAR PHYSICS – Chapter Test Marking Scheme: +4 for correct answer, -1 for incorrect, 0 for no response. Section A – Physics Single Correct (20 MCQs) Q1. When aluminium is bombarded with fast neutrons: 13 Al 27 + n → 11 Na 24 + x What is x? Electron Proton Neutron Alpha particle Q2. The binding energies per nucleon for 1 H 2 and 2 He 4 are 1.1 MeV and 7.1 MeV respectively. The energy released when two hydrogen nuclei fuse to form helium is: 4.4 MeV 8.2 MeV 24 MeV 28.4 MeV Q3. A carbon nucleus emits a particle x and changes into nitrogen: 6 C 14 → 7 N 14 + x What is x? Electron Proton Alpha particle Photon Q4. The binding energy per nucleon of C–12 is 7.68 MeV and that of C–13 is 7.48 MeV. The energy required to remove the extra neutron from C–13 is nearly: ...

QFT-1

JEE Mains QFT‑1 2025 – Full Paper JEE Mains QFT‑1 2025 – FULL PAPER General Instructions: All questions carry equal marks. Marking Scheme for Single Correct Type (MCQs): +4 for correct answer, −1 for wrong answer. Marking Scheme for Numerical Type: +4 for correct answer, 0 for wrong answer. Use of calculators is not permitted. Use the given constants where required. PHYSICS (Maximum Marks: 100) Section A – Single Correct Type (+4 for correct, −1 for wrong) The electric field in a region is given by \( \vec{E} = \frac{E_0}{l} \hat{i} \). The charge contained inside a cubical volume bounded by \( x = 0, x = l, y = 0, y = l, z = 0, z = l \) is: A. \( 2\epsilon_0 E_0 l^2 \) B. \( \epsilon_0 E_0 l^2 \) C. \( 6\epsilon_0 E_0 l^2 \) D. zero The molar specific heat of a gas from kinetic theory is \( \frac{5}{2}R \). If it is not specified whether it is \( C_p \) or \( C_v \), one could conclude that the molecule...

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