407. Electrostatics

1. What does Coulomb's law describe?

The force between two charged objects
The energy of a charged particle
The magnetic field around a charged particle
The potential energy in an electric field

2. What is the SI unit of electric charge?

Coulomb
Ampere
Volt
Newton

3. Which law states that the electric field is the negative gradient of the potential?

Gauss's Law
Coulomb's Law
Poisson's Equation
Laplace's Equation

4. What is the electric potential energy of a system of charges?

Work done in assembling the charges
The force between the charges
The potential difference between the charges
The charge on each particle

5. What is the relation between electric field (E) and electric potential (V)?

E = -dV/dx
E = dV/dx
E = V/dx
E = -V/dx

6. Which equation describes the relation between electric displacement and electric field?

D = ε₀E
D = E/ε₀
D = ε₀E + P
D = ε₀E + Q

7. What does Gauss's law state?

The total electric flux through a closed surface is proportional to the charge enclosed
The total electric field inside a conductor is zero
The electric field is inversely proportional to the distance squared
The electric potential is constant inside a conductor

8. What is the electric field due to a point charge in free space?

E = (1/4πε₀) * (q/r²)
E = (1/2πε₀) * (q/r²)
E = (1/4πε₀) * (q/r)
E = q/r²

9. What is the effect of dielectric material on capacitance?

Increases capacitance
Decreases capacitance
Has no effect
Changes the frequency of the capacitor

10. What is the SI unit of electric potential?

Volt
Ampere
Coulomb
Watt