12th Science Maharashtra Board
In this category students supposed to ask questions which belong to std 12th maharashtra board Science
- A resistor held in running water carries electric current. Treat the resistor as the system Answer: (a) No (b) Yes (c) Yes, electrical work is done on the resistor (d) Δ U = 0 , so the heat given to the water equals the electrical w... 1
- State and explain the first law of thermodynamics The first law of thermodynamics is a form of law of conservation of energy applied to a system. Mathematically it can be written as Q=triang... 1
- At what temperature will the rms speed of air molecules be double that NTP? The correct answer is 1092K or 819°C Explanation :: We have V_rms=√(3RTover M) --at T= T₀ (NTP) V_rms=√(3RT₀over M) But at temperature T V_r... 1
- If z1, z2 are complex numbers such that, 2z13z12z13z1is purely imaginary number, then finds |z1−z2z1+z2z1−z2z1+z2 | since , 2z₁/3z₁ is purely imaginary 2z₁/3z₁ == λ for some λ ∈ R z₁over z₂= 3 λ over2i Now , 2
- What are balance band and conduction band? Valence band The band having lower energy than conduction band is the valence band. The electrons in valence band are not free to move becau... 1
- What is the angular momentum of the electron in the third Bohr orbit in the hydrogen atom? Angular momentum of an electron in the nth Bohr orbit of hydrogen atom L= nh over 2π For n=3 L=3hover 2π L=3×1.055×10⁻³⁴ L=3.165 × 10⁻³⁴ Kg... 1
- The Boolean expression for an AND gate is ____. a) A+B b) A.B c) A+B d) A.B b) A.B is the correct answer 2
- A simple pendulum is suspended from the roof of a train. If the train is moving with an acceleration of 49 cm/s2 , pseudo force=ma gravity=mg tan θ = maover mg θ = tan⁻¹(maover mg) =tan⁻¹( 0.49over 9.8) =tan⁻¹(0.05) = 3 ^o 1
- all physics formulas {maharashtra board} read below pdf for all formulas from modern physics and shortcut files deleted edit01** 1