Electric potential

What is work done in moving a charge of 4C from one point to another point having potential difference of 5volt

• 4/5 J

• 5/4 J

• 20J

• 1J

64 drops of same size are charged to 300V each , These drops combine to form a bigger drop, calculate the potential of bigger drop

• 4800V

• 360

• 100V

• 800V

A point charge 2nC is located at origin. What is the potential at (1,0,0)?

• 12

• 14

• 16

• 18

A point A is at potential +500v and B is a point of potential -500 v the works done by external agent to take a unit positive charge from A to B is

• +1000J

• -1000J

• +500J

• -500J

A tin nucleus has charge +50 e if the proton is at a distance of 10^-12 m from the nucleus then the potential v at this position is charged on proton= 1.6 x 10^-19 C

• 14.4 x 10⁴ volt

• 7.2 x 10⁴ volt

• 7.2 x 10⁸ volt

• 14.4 x 10⁸ volt

The potential at a point due to an electric dipole will be maximum and minimum when the angles between the axis of dipole and line joining at point to dipole are respectively

• 90⁰ and 180⁰

• 0⁰ and 90⁰

• 90⁰ and 0⁰

• 0⁰ and 180⁰

A charge of IC is placed at centre of spherical shell of radius 10 cm what will be done in a moving a charge of +1 MC on its surface through its distance of 5 cm

• 10

• 0

• Data insufficient

• 0.1 J

Three Point charges Q, -2Q and -2Q are placed at the vertices of an equilateral triangle of side r . The work done to increases their separation to 2r is

• Zero

• 12J

• 20J

• 40 J

A cube of side √3 m charge of 1microcoulomb at each of its eight vertices Find the Potential and electric field at the centre of Cube

• 48x10³ V , zero

• 38x 10³ V , 2N/C

• 28x10³ V , 4N/C

• 18x10³ V , zero

What should be Capacitance of a capacitor capable of storing 1J of energy when potential difference of 100V is applied between the plates

• 1x10^-4F

• 2x10^-4F

• 3x10^-4F

• 4x10^-4F