Physics Test - ...

The time period of a freely suspended magnet is 4 seconds. If it is broken in length into 2 similar parts and one part is suspended in the same way, then calculate its time period.

Two charges +5μ and +10μ are kept 20 cm apart. Find the net electric field at the mid-point between the two charges.

A current carrying rectangular coil is kept in a uniform magnetic field. In which orientation, the coil will not tend to rotate?

As shown in following figure, four charges are kept on corners of a square having side of 5 cm. If Q is one microcoulomb, then what will be the electric field intensity at center?

What is the acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of the electron is 1.76 x 10¹¹ C/kg?

Masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio of 5:3:1. What is the ratio of their electrical resistances?

The time period of a freely suspended magnet is 2 sec. If it is broken in length into two equal parts and one part is suspended in the same way, then calculate its time period.

A charge (-q) and another charge (+Q) are placed at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (- q) at A is moved to another point C such as ABC forms an equilateral triangle of side 'l'. What is the net work done in moving the charge (- q)?

A charged particle of mass 'm' and charge 'q' is released from rest in a uniform electric field E. What is the kinetic energy of the charged particle after 't' second, by neglecting the effect of gravity?