A charged oil drop is suspended in a uniform field of 3 x 104 V/m so that it neither falls nor rises.The charge on the drop will be (Mass of charge = 9.9 x 10-15 kg and g = 10 m/s2)
The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.If the resultant is at 90° with the force of the smaller magnitude then their magnitudes are:
If a person with a spring balance and a body hanging from it goes up and up in an airplane then the reading of the weight of the body as indicated by the spring balance will
In Michelsion's interferometer, if a dark fringe is seen in the beginning, the next dark fringe will appear by moving the moveable mirror through a distance
A uniform beam of weight 100 N is 4 m long and is supported 1.0 m from one end. A load of weight wN hangs from that ened and the beam is in equilibrium.What is the value of w?
