The inward and outward flux are `phi_1 ` and `phi_2` respectively then the charge inside the surface is:

If the inward and the outward electric flux through a closed surface be phi _(1) and phi _(2) , the charge inside the closed surface is

If the sides of a triangle are in A.P. and the greater and the least angles are theta and phi respectively, then show that, 4(1-cos theta)(1-cos phi) = cos theta +cos phi

Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface ofthe box is 8.0x10^3Nm^2//C . What is the net charge inside the box ?

A coil of resistance R having n turns is connected with a galvanometer of resistance 4R. If the magnetic flux changes from phi_(1) to phi_(2) in time t in the circuit, what will be the value of induced current?

The total flux phi comes out of a sphere of radius r. Keeping the amount of charge constant, if the radius of the sphere is made 2r, how much flux will come out of the sphere now?—

A point charge causes an electric flux of . -1.0 times10^3Nm^2//C to pass through a spherical Gaussian surface of 10.0 cm radius centered on the charge, ) If the radius of the Gaussian surface were doubled, how much Flux would pass through the surface ?

The instantaneous magnetic flux phi in a, circuit is phi = 4t^2 - 4t + 1 . The total resistance of the circuit is 10Omega . At t = 1/2s , the induced current is—