A\ এবং B\ এর কাছে কিছু টাকা আছে। যদি\r\nA\nB\n কে 30 টাকা দেয়, তাহলে B\nএর দ্বিগুণ\r\nটাকা থাকবে...

In a triangle, P ,\ Q\ a n d\ R are the mid-points of sides B C ,\ C A\ a n d\ A B respectively. If A C=21\ c m ,\ B C=29 c m\ a n d\ A B=30 c m , find the perimeter of the quadrilateral A R P Q

A right - angled isoceles prism is held on the surface of a liquid composed of miscible solvents A and B of refractive index n_A = 1.50 and n_B = 1.30 respectively . The refractive index of prism is n_p = 1.5 and that of the liquid is given by N_L = C_A n_A +(1 -C_A) n_B where C_A is the percentage of solventA in the liquid IF theta_C is the critical angle at prism - liquid interface . the plot which best represents the variation of the critical angle with the percentage of solvent is

A coil C of N turns is placed around a long solenoid S of radius R and n turns per unit length, as in Fig. 30-38. (a) Show that the mutual inductance for the coil-solenoid combination is given by M = μ_(0)piR^(2)nN . (b) Explain why M does not depend on the shape, size, or possible lack of close packing of the coil.

In Figure, A B a n d C D are parallel lines and transversal E F intersects them at P a n d Q respectively. If /_A P R=25^0, /_R Q C=30^0a n d /_C Q F=65^0, then x=55^0, y=44^0 (b) x=55^0, y=45^0 x=60^0, y=35^0 (d) x=35^0, y=60^0

A coil is placed in y-z plane making an angle of 30^(@) with x-axis . The current through coil is I, and number of turns are N. If a magnetic field of strength 'B' is applied in positive x-direction, then find the torque experienced by coil: (Radius of coil is R) (N = 100, I = 1A, r = 2m , B = 1/pi T)