A dipole with its charges -q and =q located at the points (0,-b,0) and (0,+b,1) is present in a uniform electric field E. The equipotential surfaces of this field are planes parallel to the YZ planes:- How much torque would the dipole experience in this filed?

A dipole with its charges -q and =q located at the points (0,-b,0) and (0,+b,0) is present in a uniform electric field E. The equipotential surfaces of this field are planes parallel to the YZ planes:- What is the direction of the electric field E?

Two point charges of magnitude +q and -q are placed at (-d/2, 0, 0) and (d/2, 0, 0) respectively. Find the equation of the equipotential surface where the potential is zero.

A rectangular coil 20cmxx20cm has 100 turns and carries a current of 1 A . It is placed in a uniform magnetic field B=0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

Two charge of magnitudes - 4Q and + 2Q are located at points (2a, 0) and (5a, 0) respectively. What is the electric flux due to these charges through a sphere of radius 4a with its centre at the origin?

Two charges of magnitude -2Q and +Q are located at points (a,0) and (4a,0) respectively . What is the electric flux due to these charges through a sphere of radius '3a' with its centre at the origin?

Two equal charges q are placed at the vertices A and B of an equilateral triangle ABC of side a. the magnitude of electric field at the point C is

Two charges - q and + q are located at points A(0,0, -a) and A(0,0, + a) respectively. How much work is done in moving a test charge from point P (7,0,0) to Q(-3,0,0)?

A current i flows in a circular coil of radius r . If the coil is placed in a uniform magnetic field B with its plane parallel to the field, magnitude of the torque that acts on the coil is

If a simple pendulum has charge ,q and is oscillating in a uniform electric field E in the direction of acceleration due to gravity then its frequency of oscillations

Infinite charges of magnitude q each are lying at x=1,2,4,8…… metre on x-axis. The value of intensity of electric field at point x=0 due to these charges will be