Electric Charges And Fields Mock Tests

A uniform electric field E is applied along the positive x-axis. A dipole is placed in this field with its dipole moment making an angle θ with the field direction. For stable equilibrium, θ should be:

A regular octahedral molecule has an identical charge +Q placed at each of its six vertices. The electric field at the centre of the octahedron is:

A spherical conductor of radius R has charge Q uniformly distributed on its surface. The electric field just inside the sphere at a distance r < R from the centre is:

Two point charges q₁ = +2 μC and q₂ = +8 μC are placed 6 cm apart in vacuum. The position on the line joining the charges where the electric potential is minimum is:

A point charge +Q is placed at the centre of a cube. The electric flux through one face of the cube is:

Two point charges +3 μC and -3 μC are separated by 2 mm forming an electric dipole. The dipole is placed in a uniform external electric field of 1.5 × 10³ N/C. The maximum torque experienced by the dipole is:

A thin conducting spherical shell of radius R has a charge Q uniformly distributed on its surface. The electric field at a distance r from the centre (r > R) is directed:

An electric dipole with dipole moment p⃗ is placed in a uniform electric field E⃗. The maximum torque experienced by the dipole occurs when the angle between p⃗ and E⃗ is: