Coulomb's Law of Electrostatics

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What is the significance of the value of k in Coulomb's law?

It determines the distance between two charges.

It determines the force of attraction between two charges.

It determines the type of charge, whether positive or negative.

It determines the size of the unit of charge. (correct)

What is the unit of charge that results from the choice of k in SI units?

Newton

Ampere

Tesla

Coulomb (correct)

What is the magnitude of the electrical force of repulsion between two charges of 1 C each at a distance of 1 m in vacuum?

9 × 10^8 N

9 × 10^9 N (correct)

9 × 10^10 N

9 × 10^7 N

What is implicit in Coulomb's law?

The assumption of additivity of charges and conservation of charge. Signup and view all the answers

What is the assumption made when considering the charged metallic spheres as point charges?

The radius of each sphere is much smaller than the distance between them. Signup and view all the answers

What device did Coulomb invent to measure the quantity of a force?

Torsion balance Signup and view all the answers

What did Cavendish use the torsion balance to measure later?

The very feeble gravitational force between two objects. Signup and view all the answers

What was the purpose of Coulomb's process of putting a charged sphere in contact with an identical uncharged sphere?

To generate a series of charges that can be used to test the relation between force and charge. Signup and view all the answers

What is the significance of the symmetry in the distribution of charge when a charged sphere is put in contact with an identical uncharged sphere?

The charge is equally distributed between the two spheres. Signup and view all the answers

What is the advantage of using a torsion balance in Coulomb's experiment?

It allows for the measurement of very small forces. Signup and view all the answers

What is the result of varying the distance for a fixed pair of charges and measuring the force for different separations?

The force decreases with increasing distance. Signup and view all the answers

What is the range of distances over which Coulomb's law has been established?

From macroscopic to subatomic scale. Signup and view all the answers

Coulomb's Law of Electrostatics

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Questions and Answers

What is the significance of the value of k in Coulomb's law?

What is the unit of charge that results from the choice of k in SI units?

What is the magnitude of the electrical force of repulsion between two charges of 1 C each at a distance of 1 m in vacuum?

What is implicit in Coulomb's law?

What is the assumption made when considering the charged metallic spheres as point charges?

What device did Coulomb invent to measure the quantity of a force?

What did Cavendish use the torsion balance to measure later?

What was the purpose of Coulomb's process of putting a charged sphere in contact with an identical uncharged sphere?

What is the significance of the symmetry in the distribution of charge when a charged sphere is put in contact with an identical uncharged sphere?

What is the advantage of using a torsion balance in Coulomb's experiment?

What is the result of varying the distance for a fixed pair of charges and measuring the force for different separations?

What is the range of distances over which Coulomb's law has been established?

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