A two-slit arrangement is set up to produce an interference pattern on a screen. The fringes are too close together for convenient observation. How could the distance between them be increased?
On the ground the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50,where R is the radius of the Earth
Five equal forces of 10N each are applied at one point and all are lying in one plane.If the angles between them are equal,the resultant force will be:
The displacement time graph for the two particles A and B are straight lines inclined at 60° and 30° with the same axis.The ratio of the velocity of B is
The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart,with force of repulsion between the spheres to be 10-19 N,is
The force exerted by the fluid in a hydraulic pump on the piston is 2000 N.If the area of the piston is 10 cm2 the fluid pressure on the piston is in N/cm2
If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre,then the potential at a point distance 15 cm from the centre will be
A boy walks uniformly along the sides of a rectangular park of size 400 m x 300 m.starting from one corner to the other corner diagonally opposite.Which of the following statements is incorrect?
