(a) 13 m/s (b) 12 m/s (c) 5 m/s (d) 10 m/s Answer:Â The correct answer is (a) 13 m/s velocity in x-direction should counter the flow so as to... View Article
A 20F capacitor is charged to 5V and isolated. It is then connected in parallel to an uncharged capacitor of 30F. The decrease in the energy of... View Article
The velocity of the centre of a smaller cylinder is v. There is no slipping anywhere. The velocity of the centre of larger cylinder is (a)... View Article
The total energy of the electron in the first excited state of hydrogen is `-3.4 ev.` What is the kinetic energy? (a) + 3.4 eV (b) +4.3 eV (c)... View Article
Select the from following best experimental setup for tracing the part of the ray of light passing through a rectangular glass slab. (a) P... View Article
If the rotational speed of earth is increased then weight of a body at the equator (a) increases (b) decreases (c) no changes (d) increases... View Article
A far sighted person can see object beyound 94 cm clearly, if separation between glasses and eye lens is 2 cm, then find the focal length.... View Article
A block is limiting equilibrium on a rough horizontal surface. If the net contact force is times the normal force, the co-efficient of the... View Article
The total average energy density of e.m waves whose electric field variation is given by e = (50 n/c) sin (ωt - kx) will be nearly (a) 10-8 J/m3... View Article
A light ray suffers minimum deviation, while passing through a prism of refractive index 1.5 and refracting angle 600. Calculate the angle of... View Article
A thin convex lens is made of two materials with refractive indices n1 and n2 as shown in the figure. The radius of curvature of the left and... View Article
When three coins are tossed at once, the sample space is {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT}. I.e., n(S) = 8 Let E be the event of... View Article
When three coins are tossed simultaneously, the sample space becomes 23 = 8 S = {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT} Probability of... View Article
Given that ABC is a triangle where DE || BC and it is shown as follows: Also, given that AD = x, DB = x - 2, AE = x + 2 and EC = x - 1 By... View Article
The electrical configuration of Group 16 components is ns2np4. As a result, they should have a maximum oxidation state of +6, however the heavier... View Article
Levigation is based on the difference in densities of the metallic ore and gangue particles. Powdered ore is treated with a stream of running... View Article
Energy of electron in hydrogen-like atom, En = −Z^(2)Rhc/n^(2) = −3.4eV Kinetic energy of electron in hydrogen-like atom is equal to negative... View Article
