Electric Charge and Electric Field Quiz

State the SI unit of electric charge.

• Coulomb (C)

• Ampere (A)

• Ohm (Ω)

• Volt (V)

Two point charges of +3 μC and -5 μC are placed 8 cm apart. Calculate the force between them.

• 2.34 x 10^-3 N

• 1.88 x 10^-10 N

• 2.34 x 10^-9 N

• 1.88 x 10^-4 N

A charge of +2 μC is placed at the origin. Draw the electric field lines around it.

• The electric field lines will point towards the origin

• The electric field lines will form a perfect circle around the origin

• The electric field lines will be parallel to the x-axis

• The electric field lines will radiate outward from the origin.

Explain the concept of electric field lines and their significance.

• Electric field lines have no significance in the study of physics.

• Electric field lines are only visible in a vacuum.

• Electric field lines are used to measure the temperature of charged objects.

• Electric field lines help visualize the direction and strength of the electric field around charged objects.

Calculate the electric field at a point located 10 cm away from a +4 μC charge.

• The electric field at a point located 10 cm away from a +4 μC charge is 3.6 x 10⁴ N C^-1.

• The electric field at a point located 10 cm away from a +4 μC charge is 1.2 x 10⁴ N C^-1.

• The electric field at a point located 10 cm away from a +4 μC charge is 2.5 x 10⁴ N C^-1.

• The electric field at a point located 10 cm away from a +4 μC charge is 5.0 x 10⁴ N C^-1.

What is the direction of the electric field due to a negative point charge?

• Tangential

• Radially inward

• Radially outward

• No direction

Explain the concept of electric field due to point charges and how it varies with distance.

• The electric field due to a point charge varies directly with the distance from the point charge.

• The electric field due to a point charge varies inversely with the square of the distance from the point charge.

• The electric field due to a point charge remains constant regardless of the distance from the point charge.

• The electric field due to a point charge varies linearly with the distance from the point charge.

What is the SI unit of Coulomb's constant (k)?

• N^-1 m C^-2

• N^-1 m² C^-2

• N m² C^-2

• N m C^-1

What is the correct relationship involving Coulomb's Law?

• The force between two charged objects is directly proportional to the square of their charges and inversely proportional to the distance between their centers
• The force between two charged objects is inversely proportional to the product of their charges and directly proportional to the square of the distance between their centers
• The force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between their centers.

• The force between two charged objects is directly proportional to the product of their charges and directly proportional to the distance between their centers

If the distance between two charges is doubled, how does the electrostatic force change, according to Coulomb's Law?

• Halves

• Doubles

• Quadruples

• Remains the same