A spherical rubber balloon carries a charge, uniformly distributed over the surface. As the balloon is blown…
A spherical rubber balloon carries a charge, uniformly distributed over the surface. As the balloon is blown up and increases in size, the total electric flux coming out the surface
becomes zero
decreases
increases
remains unchanged
Solution
According to Gauss' law, $\phi=\frac{q}{\varepsilon_0}$
As charge remains unchanged when size of balloon increases, electric flux through the surface remains unchanged.