Electrostatics Quiz 1

Which of the following is a valid charge ?

• 1.6 e-

• 2.6 C

• 3 e-

• 2.6 e-

Electric potential at a point due to a dipole is

How much work must we do on an electron to move it from point A, which is at a potential of +50V, to point B, which is at a potential of -50 V, along the semicircular path shown in the figure? Assume the system is isolated from outside forces. (e = 1.60 × 10^-19 C)

• 1.60 × 10^-17 J
• -1.6 J
• 1.6 J
• -1.60 × 10^-17 J

A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct?

• The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest.
• The potential at points A and B are equal, and the potential at point C is lower than the potential at point A.
• The potential at all three locations is the same.
• The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A.

The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?

• 600 V
• 50 V
• 200 V
• 400 V

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

What is the name of this device that is used to detect charges?

• beaker
• electroscope
• van de graff generator
• chargometer

A charged ebonite rod 'B' is brought near another similarly charged and suspended, ebonite rod 'A'. Then ebonite rod A, would-

• Remain unaffected

• Move towards rod B

• Move away from rod B

• Start oscillating

A sudden electric discharge between A charged up cloud and some other objects is called-

• Lighting

• Earthing

• Thundering

• None

the negatively charged particle in an atom, moves freely, can be released, shared, or “stolen” from an atom

• proton

• neutron

• electron