Electric Potential and Potential Difference
Physics ⇒ Electricity and Magnetism
Electric Potential and Potential Difference starts at 10 and continues till grade 12.
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A proton is moved from point A to point B against an electric field. Does its electric potential energy increase or decrease?
Describe what happens to the electric potential as you move farther away from a positive point charge.
Describe what is meant by the term 'potential difference' between two points in an electric field.
Explain the significance of zero potential at infinity in the context of point charges.
Two point charges, +3 μC and -3 μC, are separated by a distance of 0.2 m in vacuum. Calculate the electric potential at the midpoint between the two charges. (Take k = 9 × 109 N·m2/C2)
A charge of -5 μC is moved from a point at 120 V to a point at 80 V. Calculate the work done by the electric field during this process.
A particle of charge +2 μC is moved from point X to point Y in a uniform electric field of strength 500 N/C. The displacement from X to Y is 0.04 m and is parallel to the field lines. Calculate the change in electric potential energy of the particle.
A proton is released from rest at a point where the electric potential is 150 V. What is its speed after moving to a point where the potential is 50 V? (Assume no other forces act and mass of proton = 1.67 × 10-27 kg, charge = 1.6 × 10-19 C)
Which of the following best defines electric potential at a point? (1) The work done in moving a unit positive charge from infinity to that point (2) The force experienced by a unit positive charge at that point (3) The energy stored per unit charge at that point (4) The work done in moving a unit negative charge from infinity to that point
Which of the following is NOT a property of equipotential surfaces? (1) They are always perpendicular to electric field lines (2) No work is done in moving a charge along an equipotential surface (3) They can intersect each other (4) The potential is constant at every point on the surface
Which of the following is the correct formula for the electric potential due to a point charge Q at a distance r? (1) V = kQ/r (2) V = kQ/r2 (3) V = kQ2/r (4) V = k/rQ
Which of the following is the correct relationship between potential difference (V), work done (W), and charge (Q)? (1) V = W/Q (2) V = Q/W (3) V = W × Q (4) V = W + Q
Fill in the blank: The electric potential at a distance r from a point charge Q is given by V = ________.
Fill in the blank: The potential at infinity is usually taken as ________ when calculating electric potential due to point charges.
Fill in the blank: The potential difference between two points is measured using a ________.
The SI unit of electric potential is ________.
State whether the following is true or false: The potential at the center of a charged conducting sphere is equal to the potential at its surface.
State whether the following is true or false: The work done in moving a charge between two points on the same equipotential surface is zero.
True or False: Electric potential is a scalar quantity.
True or False: The electric potential inside a conductor in electrostatic equilibrium is constant throughout the conductor.
