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  1. U

    Help? i just want to die..

    hey u can do it together. bt dun b depressed. n dun even think of committing suicide. ok?
  2. U

    Physics MCQs thread.

    grating: m*lamda = d*sin theta 1*lamda = d*sin30 lamda = 0.5d interference: slit spacing = 500d fringe spacing = (lamda*distance from screen)/slit spacing x = (0.5d*1)/500d x = 1*10^-3 m
  3. U

    Physics MCQs thread.

    s = ut + 1/2 at^2 for vertical motion as vertical initial velocity is zero, so s = 1/2 at^2 1.25 = 1/2*9.8*t^2 t = 0.50 s = vt for horizontal motion 10 = v*0.5 v = 20
  4. U

    Physics MCQs thread.

    we do when we have to find the speed of approach and/or separation. in momentum, we add velocities which are in the same direction and subtract when they are in opposite directions
  5. U

    Physics MCQs thread.

    momentum is conserved in every situation. in inelastic collision, velocity and therefore kinetic energy is not conserved
  6. U

    Physics MCQs thread.

    9.9 m deep
  7. U

    Physics MCQs thread.

    i even dun knw that answer. sorry :oops:
  8. U

    Physics MCQs thread.

    it shud be B :%)
  9. U

    Physics MCQs thread.

    cox half of mass is transferred to Y
  10. U

    Physics MCQs thread.

    current in P is I current in Q and R is (I/2) power = I^2*R for P, power= I^2*R for Q, power= (I/2)^2*R for R, power= (I/2)^2*R 12= (I/2)^2*R + (I/2)^2*R + I^2*R 12= I^2*R (0.25 + 0.25 +1) 12/1.5 = 8 I^2*R = 8 for R, power is 0.25 I^2*R that is 2W
  11. U

    Physics MCQs thread.

    all the wires are in parallel wid each other. so it will be [(6*10^-1) + (100^-1)]^-1
  12. U

    Physics MCQs thread.

    is the ans B?
  13. U

    Physics MCQs thread.

    ur welcum :)
  14. U

    Physics MCQs thread.

    young modulus is a characteristic of material. if material is same, the young modulus is same
  15. U

    Physics MCQs thread.

    cox pressure difference is density*gravity*height difference here the height difference is 2H
  16. U

    Physics MCQs thread.

    E = F/q E= mg/q q/m= g/E wight is downward, so force shud be upwards to maintain equilibrium. the direction of field is positive to negative. negative particle will have a force acting upwards. so ans is B
  17. U

    Physics MCQs thread.

    when right side will inc by distance H, the lft side will dec by H. so the difference of height will be 2H. pressure will be density*gravity*2H
  18. U

    Physics MCQs thread.

    wat is the ans of dis?
  19. U

    Physics MCQs thread.

    i also dun knw the answer to tht ques. sorry
  20. U

    Physics MCQs thread.

    which previous ques? can u post it again?
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