All questions
- If The Unit Of Mass, Length And Time Are Doubled,unit Of Angular Momentum Will Be Correct answer is option C) Quadrupled hence , unit of angular momentumn is quadrupled 1
- Maharashtra SSC Model Question Paper 2021 PDF Links Maharashtra SSC Model Question Paper 2021 PDF Links Maharashtra Board Class 10 all subjects sample paper is a fruitful resource, which invol... 1
- [Algebra] Maharashtra Board Maths part 1 previous year paper march 2020 Maharashtra Board Maths previous year paper march 2020 To view online View To download for offline study download link For study now 1
- If α, β and γ are three consecutive terms of a non-constant G.P. such that the equations Correct option is 4) βγ α x² + 2β x + γ = 0 Let β = α t, γ = α t² therefore α x² + 2α tx + α t² = 0 ⇒ x² + 2tx + t² = 0 ⇒ (x + t)² = 0 ⇒ x =... 1
- The Boolean expression ∼(p⇒(∼q)) is equivalent to : Correct option is A) p^q Explaination:: ∼(p⇒(∼q)) as p⇒q \ is \ same \ as \ ∼p v q we get ∼((∼p) v(∼q)) = p^q 1
- A triangle has a vertex at (1, 2) and the mid points of the two sides through it are (-1, 1) and (2, 3). Then the centroid of this triangle is: Correct option is 2) ( 1/3,rm 2 ) Explanation:: 1
- A plane which bisects the angle between the two given planes 2x – y + 2z – 4 = 0 and x + 2y + 2z – 2 = 0, passes through the point :0 Correct option is (4) (2, –4, 1) Explaination:: From question, the equations of planes given are: 2x – y + 2z – 4 = 0 X + 2y + 2z – 2 = 0 Th... 1
- The equation of the common tangent to the curves y^2 = 16x and xy = - 4 is Answer: (a) x - y + 4 = 0 Any tangent to the parabola y² = 16x (here 4a = 16 , so a = 4 ) with slope m is y = mx + 4/m For it to touch the h... 1
- The equation of the common tangent to the curves y^2 = 8x and xy = - 1 is Correct option is (d) y=x+2 Explaination:: tangents to the curve y²=8x is y=mx+2/m , so it must satisfy xy=-1 x(mx+2/m)=-1 mx²+2/mx+1=0 , si... 1
- The general solution of the differential equation (y^2 – x^3 )dx – xydy = 0 (x ≠ 0) is : The correct option is 2) y²+2x³+cx²=0 Detailed explaination 1
- Let a ∈ (0,π/2) be fixed. If the integral ∫ tan x + tan α/tan x - tan α dx = A(x) cos 2α + B(x) sin 2α + C, where C is a Correct option is (4) x – α and log_e|sin(x – α)| Detailed Explaination: ∫ tan x + tan α/tan x - tan α dx = ∫ sin x /cos x+ sin α/cos α/sin... 1
- A particle is moving along a circular path with a constant speed 30 m/s. Correct Answer is option B) 30sqrt2 https://youtu.be/1hcDKwGYKlE 1
- A coil of inductance 300 mH and resistance 2 is connected to a source of voltage 2 V. Correct answer is option d) 0.1 s Explaination: During growth of charge in an inductance, I = I₀ (1 – e ^(–Rt/L)) or I₀/2 = I₀(1 – e^( –Rt/L... 1
- When current in a coil changes from 5 A to 2 A in 0.1 s, an average voltage of 50 V is produced Correct option is 2) 1.67H Explaination EMF = L × di/dt 50 = L × (5-2)/0.1 = L × 30 L = 5/3 = 1.67 1
- A rectangular loop is present in the magnetic field region of an infinite long wire. Now the loop is being rotated as shown in the figure. option B is correct 1
- A conducting square loop is placed in a magnetic field B with its plane perpendicular to the field. The sides of the loop start shrinking at a constant rate Correct solution is option A ) 2aα B Explaination: "a" at any time "t" , the side of the square a= (a₀-α_t) , where α₀ side at t=0 . at this... 1
- A conducting circular loop made of a thin wire, has area 3.5 x 10–3 m2 and resistance 10Ω . Correct option is A) 0.14 mC Explaination: Q=triangleφ/R=1/10A(B_f-B_i) \\ =1/10×3.5×10⁻³(0.4sinπ/2-0) \\ 1/10×3.5×10⁻³(0.4-0)\\ 1.4×10⁻⁴=0.... 1
- Suppose that f is differentiable for all x and that f’(x) ≤ 2 for all x. If f(1) = 2 and f(4) = 8, then f(2) has the value equal to LMV Theorem for f in [1, 2] forall c in(1, 2) f(2)-f(1)/2-1 =f'(c) ≤ 2 f(2)-f(1) ≤ 2 ⇒ f(2) ≤ 4 ...(1) Again, using LMV Theorem in [2, 4] fo... 1
- When seen from below, the blades of a ceiling fan are seen to be revolving anticlockwise and their speed is decreasing. Correct answer is (B) Angular velocity downwards, angular acceleration upwards. 1
- The system of linear equations x + y + z = 2 , 2x + 3y + 2z = 5 , 2x + 3y + (a2 – 1)z = a + 1 Correct option is inconsistent when |a|= sqrt3 Solution:: D=beginvmatrix 1&1&1\\2&3&2\\ 2 &3 &a²-1 endvmatrix D= 1(3a²-3-6) - 1(2a²-2-4) + 1... 1
- O. Why do we see bands separating in column chromatography? we see bands separating in column chromatography Because , In column chromatography, the solutes get adsorbed on the stationary phase, they... 1
- N. Name the different types of Chromatography and explain the principles underlying them. There are two types of chromatography namely: Liquid chromatography ⇒ separate ions that are dissolved insolvent Gas chromatography ⇒ separa... 2
- M. List the properties of solvents which make them suitable for crystallization The properties of solvents which make them suitable for crystallization are The compound to be crystallized should be least or sparingly sol... 1
- L. Define a. Solvent extraction b. Distillation. Solvent extraction : it is ultimately a process of partitioning between two immiscible solvents, and for its optimization, it is necessary t... 2