Question of the day

Q- A satellite of the Earth is moving in a circular orbit of radius R. By what fraction its velocity v be increased for the satellite to be in an elliptical orbit with minimum distance from the Earth equal to R and maximum distance from the Earth equal to 2R? 

Solution:

Q- One mole of an ideal gas is contained in a thermally insulated container that is connected to another container of equal volume that is initially evacuated. The valve connecting the two containers is now opened and the gas allowed to expand isothermally to fill both sides. The new total volume is...

Q- A point charge q is placed at each corner of a cube of edge l. Find electrostatic energy of the system of charges.

Solution:

Q (a)- A beta particle (high-speed electron) is traveling at right angles to a 0.5 T magnetic field. It has a speed of 2.5 * 10⁷ m/s. What size force acts on the particle? (b) A magnetic field of 25 T acts in a direction due west. An electron is traveling due south at 7.0 * 10⁵ m...

Q- Find the angle of projection φ with the incline to maximize the range of a projectile down the incline making an angle θ bellow horizontal and calculate this maximum range if the speed of projection is V0.

Solution:

Q- Find inductance per unit length between two parallel conducting wires, each with radius a, separated by distance d, where d >> a? 

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