Semi-Final Quiz - Electricity

1.Who is credited with the concept of positive and negative charges in electrostatics?

• Albert Einstein

• Isaac Newton

• Benjamin Franklin

• Thomas Edison

What is the fundamental law governing electrostatic force between charged objects?

• Newton's law of gravitation

• Faraday's law

• Coulomb's law

• Ohm's law

Which type of material allows easy flow of electric charges?

• Insulators

• Semiconductors

• Superconductors

• Conductors

What are the two types of charges observed in electrostatics?

• Positive and negative

• North and south

• Up and down

• Left and right

Which material has properties between those of conductors and insulators?

• Semiconductors

• Superconductors

• Polarizers

• Dielectrics

Which type of material inhibits the flow of electric charges?

• Conductors

• Semiconductors

• Superconductors

• Insulators

What is the primary difference between conductors and insulators concerning the movement of charges?

• Conductors allow free movement of charges, while insulators restrict their movement.

• Insulators allow free movement of charges, while conductors restrict their movement.

• Conductors and insulators both allow free movement of charges.

• Conductors and insulators both restrict the movement of charges.

What happens to the electrostatic force between two charges when the distance between them is doubled?

• It is halved.

• It is doubled.

• It is quadrupled.

• It remains the same.

What type of charges does an object acquire when it gains electrons?

• Positive charges

• Negative charges

• Neutral charges

• Both positive and negative charges

What is the mathematical form of Coulomb's law that describes the electrostatic force between two charged objects?

• F = k  ((|q1∗ q2|)/r^2 )

• F = k  ((|q1| )/(q2 ∗ r))

• F = k  (( r  )/(q1 ∗ q2 ))

• F = k q1 q2 * r