Doubtly
@Doubtly · Joined Feb 2021
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- 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
- A person standing on the bank of the river observes that the angle of elevation of the top of a tree Let the height of the tree = h Let the width of the river =w Angle of elevation when standing on the bank = 60∘ When moved 40 m away from th... 1
- The diameter of a sphere is 6 cm. Find the total surface area of the sphere. (p = 3.14) diameter of sphere =d=6cm Radius = r=d/2 =6/2 =3cm the total surface area of sphere = 4 π r² =4 × 3.14 × 3² =4 × 3.14 × 9 =36 × 3.14 =113.04... 1
- Sides of a triangle are 7, 24 and 25. Determine whether the triangle is right-angled triangle or not By Pythagoras, if the sum of squares of two sides is equal to the square of the largest side then the triangle is said to be right-angled He... 1
- In a transistor if increase in emitter current is 4 mA and corresponding increase in collector triangle I_E=4 \\ \\ \\ triangle I_c=3.5 \ \\α=triangle I_c over triangle I_E = 3.5over4=7over8 \\ \\ β= αover1-α=7over8over 1- 7over8=7 Hen... 1
- If two identical capacitor once connected in series (Ceq = C1) and once connected in parallel So Your answer is D c₁over c₂=1over4 1
- A pulley of radius 2 m is rotated about its axis by a force F =20t-5t2 newton Torque is given by τ = FR Or α = FR/I Given F =20t – 5t2 R = 2m, I = 10 kgm2 α = (20t-5t²)×2over 10 α = 4t – t 2 ω=∫_t²α dt=2t²-t³/3 at ω =0... 1
- A particle undergoes uniform circular motion. About which point on the plane of the circle, The force will pass through the centre of the circle. Therefore, the angular momentum will remain conserved at the centre of the circle. hen... 1
- Two-point masses of 0.3kg and 0.7kg are fixed at the ends of a rod which is of length Work-energy theorem, W_allforces= 1over2 Iw² Given: w is constant So required work done to be minimum implies that I must be minimum. Let th... 1
- all physics formulas {maharashtra board} read below pdf for all formulas from modern physics and shortcut files deleted edit01** 1
- Maths Formulas For Class 10: Important Class 10 Mathematics Formulas I will put here all formulas from maharashtra board . Algebra 1. Class 10 Maths Formulas Linear Equations ,Pair of Linear Equations in two v... 1
- A and B each have certain number of oranges. A says to B, “ if you give me 10 of your oranges, Suppose A has x no. of oranges and B has y no. of oranges. According to the given conditions, we have x+10=2(y−10)⇒x−2y+30=0 (i) and, y+10=x... 1