Is the formula "Real depth/Apparent depth `= mu."` valid if viewed from a position quite away from the normal ?

A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed

A hypermetropic person has near point farther away from the normal near point (25 cm).

Obtain the relation between the real depth and apparent depth of bottom of tank filled with water when observed from air.

Answer the following questions: (d) Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or decrease?

Figure shows planar loops of different shapes moving out of or into a region of a magnetic field which is directed normal to the plane of the loop away from the reader. Determine the direction of induced current in each loop using Lenz's law.

Figure shows planar loops of different shapes moving out of or into a region of a magnetic field which is directed normal to the plane of the loop away from the reader. Determine the direction of induced current in each loop using Lenz’s law.

A particle of mass m is located in a region where its potential energy [U(x)] depends on the position x as potential Energy [U(x)]=(1)/(x^2)-(b)/(x) here a and b are positive constants… (i) Write dimensional formula of a and b (ii) If the time perios of oscillation which is calculated from above formula is stated by a student as T=4piasqrt((ma)/(b^2)) , Check whether his answer is dimensionally correct.

A block of mss m is placed on a level frictionless table. The block is attached to a horizontally aligned spring fixed with its other end and is vibrating in a horizontal with the pariod T . Suddenly at the instant of time when the spring comes to the position of euilibrium and becomes unstretched the block disconnects form the spring and continues sliding across the frictionless surface away from the until it encounters loop of radius R . What must be the amplitude of vibrations of the block s on the spring in order for the block to complets one loop without falling down?

A man pulls a bucket of water from a depth of h from a well. If the mass of the rope and that of bucket full of water are m and M respectively, the work done by the man is :