Girls are always together?
Required number of ways = 7! X 4! = 5040 x 24 = 1,20,960
The radii of curvature of the faces of a double convex lens are 20 cm and 30 cm. If focal length of the lens is 36 cm find the refractive index of t...
An electric dipole when held at 30 ֯ with respect to a uniform electric field of 103 N/c experience a torque of 12 × 10-26 Nm. C...
A spherical ball made of steel when dropped in mercury container will –
A sugar solution in a tube of length 2.0 dm produces optical rotation of 12°. Then, the sugar solution is diluted to one half of its initial concentra...
Gamma rays have greatest similarity with –
A ray of light is incident on a transparent medium at an angle of 60°. The reflected ray of light is found to be completely Q.4 polarized. Then, the r...
The mass and energy equivalent to 1 a.m.u. respectively are -
Let the electric field part of an electromagnetic wave is E = {(2.3 N/C) cos [(1.2 rad/m) y + (2.4 × 108 rad/s)t]} î.
Compute the...
Which of the following materials behaves as a dielectric?
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2....
