Class 12th - Physics - Electric Potential

Inside a hollow charged spherical conductor, the potential

• Varies directly as the distance from the centre

• Varies inversely as the distance from the centre

• Varies inversely as the square of the distance from the centre

• Is constant

A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10 V. The potential at the centre of the sphere is

• 0 V

• 10 V

• Same as at point 5 cm away from the surface

• Same as at point 25 cm away from the surface

If a unit positive charge is taken from one point to another over an equipotential surface, then

• Work is done on the charge

• Work is done by the charge

• Work done is constant

• No work is done

Three charges 2q, -q, -q are located at the vertices of an equilateral triangle. At the centre of the triangle

• The field is zero but potential is non-zero

• Both field and potential are zero

• Both field and potential are non-zero

• The field is non-zero but potential is zero

Tags

NGSS.HS-PS2-4

Two plates are 2cm apart, a potential difference of 10 V is applied between them, the electric field between the plates is

• 20 N/C

• 500 N/C

• 5 N/C

• 250 N/C

Angle between equipotential surface and lines of force is

• 0

• 180

• 90

• 45

At the centre of an electric dipole

• Electric field and potential both are zero

• Electric field is zero but potential is not zero

• Electric field is not zero but potential is zero

• Neither electric field nor potential is zero

A charge of 5 C experiences a force of 5000 N when it is kept in a uniform electric field. What is the potential difference between two points separated by a distance of 1cm

• 10 V

• 250 V

• 1000 V

• 2500 V

Equal charges are given to two spheres of different radii. The potential will

• Depend on the nature of the materials of the spheres

• Be more on the bigger sphere

• Be equal on both the spheres

• Be more on the smaller sphere

The radius of a soap bubble whose potential is 16V is doubled. The new potential of the bubble will be

• 8V

• 2V

• 4V

• 16V