Exploring Electrostatics and Forces

What does Coulomb's Law describe?

• The gravitational force between masses.

• The magnetic force between magnets.

• The electrostatic force between charged objects.

• The chemical bond between atoms.

How does the electric field strength vary with distance?

• Electric field strength is independent of distance for all types of charges.

• The electric field strength increases with distance for point charges.

• The electric field strength decreases with distance for point charges (E ∝ 1/r²) and remains constant for uniform fields.

• The electric field strength fluctuates randomly with distance.

What is the formula for electric potential energy?

• U = mgh

• U = 1/2 kx^2

• U = qV

• U = q^2/4πε₀r

Explain the relationship between electricity and magnetism.

• Electricity and magnetism are interconnected; electric currents produce magnetic fields, and changing magnetic fields can generate electric currents.

• Electric fields are unaffected by magnetic fields.

• Magnetism is a type of electricity.

• Electricity can exist without magnetism.

How do you represent vectors in two dimensions?

• Vectors in two dimensions are represented as (a, b) in hexadecimal coordinates.

• Vectors are only represented as (x, y) in three dimensions.

• Vectors in two dimensions are represented as (x, y) in Cartesian coordinates or (r, θ) in polar coordinates.

• Vectors can only be represented using complex numbers.

State Newton's First Law of Motion.

• An object will remain in motion until it collides with another object.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will accelerate unless a force is applied.

• An object will change its velocity only if it is in motion.

What is the role of a resistor in an electric circuit?

• A resistor increases the voltage in a circuit.

• A resistor controls the flow of electric current in a circuit.

• A resistor acts as a power source in a circuit.

• A resistor stores electric energy for later use.

Define electrostatics in your own words.

• Electrostatics is the study of electric charges that are not in motion and the forces they exert on each other.

• Electrostatics is the analysis of magnetic fields and their effects on charges.

• Electrostatics is the study of moving electric charges and their interactions.

• Electrostatics refers to the behavior of electric currents in circuits.

What is the unit of electric charge?

• Coulomb

• Ohm

• Volt

• Watt

How does the electric field direction relate to positive and negative charges?

• The electric field points in random directions regardless of charge.

• The electric field points away from positive charges and towards negative charges.

• The electric field points towards positive charges and away from negative charges.

• The electric field has no relation to the type of charge.