Electric potential and Potential energy- 2021-22

As a proton moves in the direction the electric field lines...

• it is moving from low potential to high potential and gaining electric potential energy.
• it is moving from low potential to high potential and losing electric potential energy.
• it is moving from high potential to low potential and gaining electric potential energy.
• it is moving from high potential to low potential and losing electric potential energy.

Electric potential ____________ as distance increases.

• Increases

• Decreases

• Remains Constant

• Is 0

The magnitude of electric potential is ______ at an infinite distance.

• 0

• negative infinity

• positive infinity

• 200

What is voltage?

• The amount of electric potential energy per one coulomb of charge
• The amount of 1 coulomb of charge per unit of potential energy
• The number of volts per coulomb
• The amount of electric potential energy per volt

Electrostatic potential energy is recorded in units of electron-Volts (eV). What is equivalent to 1 eV?

• 1.602×10⁻¹⁹ 𝐽

• 100 𝐽

• 220 𝐽

• 0.003 𝐽

Q_A and Q_B are two charges creating an electric field. Based on the electric field lines, we can conclude

• Q_A and Q_B are both positive
• Q_A and Q_B are both negative
• Q_A is positive and Q_B is negative
• Q_A is negative and Q_B is positive

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