Скачать или смотреть JEE MAINS 2019 | 9th JAN 1st shift Complete Paper detailed solution

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In this video I m going to discuss JEE mains 9th jan 2019 paper shift 1;this video is part 1. stay tuned and subscribe our channel for upcoming parts.

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ALSO HELPFUL FOR STUDENTS PREPARING FOR #JAM, #JEST,#TIFR, #NET #GATE etc....

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Questions--

1. A convex lens is put 10cm from a light source and it makes a sharp image on a screen, kept 10cm from the lens. Now a glass block (refractive index 1.5) of 1.5cm thickness is placed in contact with the light source. To get the sharp image again, the screen is shifted by a distance d. Then d is :

2.A resistance is shown in its value and tolerance are given by

3.Drift speed of electrons, when 1.5A of current flows in a copper wire of cross section 5mm2, is v. If the electron density in copper is 9×10
28/m³ the value of v in mm/s is close to (Take charge of electron to be =1.6×10¹9

4.An L-shaped object, made of thin rods of uniform mass density, is suspended with a string as shown in figure. If AB=BC, and the angle made by AB=B, and the angle made by AB with downward vertical is θ, then.

5.A particle is moving with velocity v=k(yi+xj) where k is constant. the general eqn for its path is

6.A mixture of 2 moles of helium gas is kept at 300 k ratio of their rms speed is