12th Science Maharashtra Board
In this category students supposed to ask questions which belong to std 12th maharashtra board Science
- In a biprism experiment, the fringes are observed in the focal plane of the eyepiece at a distance of 1.2 m Given : D = 1.2 m The distance between the central bright band and the 20th bright band is 0.4 cm. ∴ y₂₀ = 0.4 cm = 0.4 x 10⁻² m W = y₂₀/20... 1
- Unpolarized light with intensity I0 is incident on two polaroids. The axis of the first polaroid makes According to Malus’ law, when the unpolarized light with intensity I₀ is incident on the first polarizer, the polarizer polarizes this incide... 1
- In a double-slit arrangement the slits are separated by a distance equal to 100 times the wavelength Data : d = 100 λ, D = 50.0 cm a) The condition for maximum intensity in Young's experiment is, d sin θ = nλ , n = 0, 1, 2..., The angle betw... 2
- A double-slit arrangement produces interference fringes for sodium light (λ =589 nm) that are 0.20° apart. Given : θ₁ = 0.20°, n_w = 1.33 In the first approximation, D sin θ_(1 )= y₁ and D sin θ_(2 )= y₂ sin θ₂/sin θ₁ = y₂/y₁ …..(1) Now, y ∝ λD/d... 1
- The optical path of a ray of light of a given wavelength travelling a distance of 3 cm in flint Let d_fg and d_m be the distances by the ray of light in the flint glass and the medium respectively. Also, let n_fg and n_m be the refractiv... 1
- White light consists of wavelengths from 400 nm to 700 nm. What will be the wavelength range seen Let λ₁ and λ₂ be the wavelengths of light in water for 400 nm and 700 nm (wavelengths in vacuum) respectively. Let λ_v be the wavelength of... 1
- Prepare a campaign for eye donation. Prepare a campaign for eye donation. 2
- Rakesh is a/an ideal son who remains devoted to his father as he grows professionally to become a/the famous doctor. Rakesh is an ideal son who remains devoted to his father as he grows professionally to become a famous doctor. As his father grows old, he t... 1
- We need to understand even the smallest details of the business in order to succeed. Write your views. Yes, I agree with the view that we need to understand even the smallest details of the business in order to succeed. The smallest details he... 2
- The astrologer was a shrewd judge of a character. Explain with some details from the extract. The astrologer spread his professional equipment and disguised himself in such a way that he could look like an astrologer. He sat near the... 2
- Astrologer's Day' has ironic elements where the astrologer pretends to have 'supernatural knowledge' Irony means a situation or statement characterized by a significant difference between what is expected and what actually happens, or betwee... 2
- Match the suffixes with the words and make nouns. One is done for you. Word suffix noun auction able auctioneer enchant ure enchantment know ment knowledge prepare eer preparation proceed ance procedure appear l... 1
- If we have to eradicate the superstitions and other ill practices from our society, what steps would you like to suggest I would like to suggest the following steps for eradicating the superstitions and other ill practices from our society. a) To make the peopl... 1
- The astrologer wins/gets the sympathy of criticism of the reader in the end. The Astrologer gets the sympathy of the readers because he was guilty of his deed and wanted to get away from it. His smartness and the tric... 1
- The astrologer feels relieved that Guru is not dead as it relieves a great burden from him. An astrologer was living under the load of thought that he had murdered Guru Nayak. So he felt guilty. But one day when he saw Guru Nayak be... 1
- The darkness load that was inside the astrologer has disappeared'. Through this sentence, An astrologer was living under the burden of thought that he had the blood of man on his hands all those days. But one day he saw a stranger... 1
- The astrologer has changed his appearance and his persona when he arrived in the city. Give specific reasons. When astrologer was a silly youngster, he quarreled with Guru Nayak and tried to kill him in wrath. He thought that he had murdered Guru Nay... 1
- English model paper std 12th board exam SECTION I – PROSE (Reading for Comprehension, Language Study, Summary, Mind Mapping) Q.1 A) Read the extract and complete the activities giv... 2
- An element with molar mass 27 g/mol forms cubic unit cell with edge length of 405 pm Given : Molar mass = M= 27 g m0l_‘ Nature of crystal = cubic unit cell Edge length = a = 405 pm = 4.05 x 10⁻⁸ cm Density = ρ = 2.7 g cm⁻³ Na... 1
- An element has a bcc structure with unit cell edge length of 288 pm. Given: Types of unit cell = bcc, for bcc unit cell n = 2 Edge length (a) = 288 pm = 2.88 x 10^(-8 )cm³ Mass of element (x) =200g Density of... 1
- In an ionic crystalline solid atoms of element Y form hcp lattice. In the given hcp lattice, Y atoms are present at 12 corners and 2 face centres. ∴ Number of Y atoms = 1/6×12 +1/2×2 = 2+1= 3 There are 6 tet... 2
- Aluminium crystallizes in cubic close packed structure with unit cell edge length of 353.6 pm. Given : Structure of Al = Cubic close packed structure = ccp structure Edge length of unit cell = a = 353.6 pm = 3.536 x 10⁻⁸ cm r = ? Numbe... 1
- The density of iridium is 22.4 g/cm3. The unit cell of iridium is fcc. Calculate the radius of iridium atom. Given : Crystal structure of iridium = fcc Molar mass of iridium = 192.2 gmol⁻¹ Density = ρ = 22.4 gcm⁻³ Radius of iridium = ? In fcc struct... 1
- Obtain the relationship between density of a substance and the edge length of unit cell. Consider edge length of cubic unit cell is a, the ∴ Volume of unit cell = a³. Suppose that mass of one particle is m and that there are n pa... 1