Gauss's Law

Description: Gauss's Law Quiz
Number of Questions: 14
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Tags: gauss's law electric fields maxwell's equations
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Gauss's Law states that the electric flux through any closed surface is proportional to the total charge enclosed by the surface. What is the proportionality constant?

  1. 1/ε0

  2. ε0

  3. 4πε0

  4. -4πε0


Correct Option: A
Explanation:

The proportionality constant in Gauss's Law is 1/ε0, where ε0 is the permittivity of free space.

A point charge of +1 μC is placed at the center of a spherical surface of radius 10 cm. What is the electric flux through the surface?

  1. 100 N⋅m^2/C

  2. 10 N⋅m^2/C

  3. 1 N⋅m^2/C

  4. 0.1 N⋅m^2/C


Correct Option: A
Explanation:

The electric flux through a spherical surface of radius r due to a point charge q at the center is given by Φ = q/ε0. Substituting the values, we get Φ = (1 μC)/(8.85 × 10^-12 C^2/Nm^2) = 100 N⋅m^2/C.

A uniform electric field of 100 N/C is applied to a rectangular surface of area 0.2 m^2. What is the electric flux through the surface?

  1. 20 N⋅m^2/C

  2. 2 N⋅m^2/C

  3. 0.2 N⋅m^2/C

  4. 0.02 N⋅m^2/C


Correct Option: A
Explanation:

The electric flux through a surface is given by Φ = EA, where E is the electric field strength and A is the area of the surface. Substituting the values, we get Φ = (100 N/C)(0.2 m^2) = 20 N⋅m^2/C.

Gauss's Law can be used to calculate the electric field of a charge distribution. What is the electric field of a uniformly charged sphere?

  1. E = kQ/r^2

  2. E = kQ/r

  3. E = kQr

  4. E = kQ/r^3


Correct Option: A
Explanation:

The electric field of a uniformly charged sphere is given by E = kQ/r^2, where k is Coulomb's constant, Q is the total charge of the sphere, and r is the distance from the center of the sphere.

Gauss's Law is a consequence of which of Maxwell's equations?

  1. Gauss's Law for Magnetism

  2. Faraday's Law of Induction

  3. Ampère's Law with Maxwell's Addition

  4. Gauss's Law for Electric Fields


Correct Option: D
Explanation:

Gauss's Law for Electric Fields is one of the four Maxwell's equations that describe the behavior of electric and magnetic fields.

Gauss's Law can be used to calculate the electric potential of a charge distribution. What is the electric potential of a point charge?

  1. V = kQ/r

  2. V = kQ/r^2

  3. V = kQr

  4. V = kQ/r^3


Correct Option: A
Explanation:

The electric potential of a point charge is given by V = kQ/r, where k is Coulomb's constant, Q is the charge of the point charge, and r is the distance from the point charge.

A hollow conducting sphere of radius R has a charge Q. What is the electric field inside the sphere?

  1. E = 0

  2. E = kQ/R

  3. E = kQ/R^2

  4. E = kQ/R^3


Correct Option: A
Explanation:

The electric field inside a hollow conducting sphere is zero.

A solid conducting sphere of radius R has a charge Q. What is the electric field inside the sphere?

  1. E = 0

  2. E = kQ/R

  3. E = kQ/R^2

  4. E = kQ/R^3


Correct Option:
Explanation:

The electric field inside a solid conducting sphere is given by E = kQ/r, where r is the distance from the center of the sphere.

Gauss's Law can be used to calculate the capacitance of a parallel-plate capacitor. What is the capacitance of a parallel-plate capacitor with plate area A and separation d?

  1. C = ε0A/d

  2. C = ε0d/A

  3. C = A/ε0d

  4. C = d/ε0A


Correct Option: A
Explanation:

The capacitance of a parallel-plate capacitor is given by C = ε0A/d, where ε0 is the permittivity of free space, A is the area of the plates, and d is the separation between the plates.

Gauss's Law can be used to calculate the inductance of a solenoid. What is the inductance of a solenoid with length L, radius r, and N turns?

  1. L = μ0N^2A/L

  2. L = μ0N^2L/A

  3. L = μ0NA/L

  4. L = μ0NL/A


Correct Option: A
Explanation:

The inductance of a solenoid is given by L = μ0N^2A/L, where μ0 is the permeability of free space, N is the number of turns, A is the cross-sectional area of the solenoid, and L is the length of the solenoid.

Gauss's Law is a fundamental law of electromagnetism. What is the significance of Gauss's Law?

  1. It relates the electric field to the charge distribution.

  2. It relates the magnetic field to the current distribution.

  3. It relates the electric field to the magnetic field.

  4. It relates the charge distribution to the current distribution.


Correct Option: A
Explanation:

Gauss's Law relates the electric field to the charge distribution. It states that the electric flux through any closed surface is proportional to the total charge enclosed by the surface.

Gauss's Law is a powerful tool for solving electrostatics problems. What are some applications of Gauss's Law?

  1. Calculating the electric field of a charge distribution.

  2. Calculating the electric potential of a charge distribution.

  3. Calculating the capacitance of a capacitor.

  4. Calculating the inductance of a solenoid.


Correct Option:
Explanation:

Gauss's Law can be used to calculate the electric field of a charge distribution, the electric potential of a charge distribution, the capacitance of a capacitor, and the inductance of a solenoid.

Gauss's Law is a fundamental law of electromagnetism. Who formulated Gauss's Law?

  1. James Clerk Maxwell

  2. Michael Faraday

  3. Carl Friedrich Gauss

  4. Albert Einstein


Correct Option: C
Explanation:

Gauss's Law was formulated by Carl Friedrich Gauss in the 19th century.

Gauss's Law is a fundamental law of electromagnetism. When was Gauss's Law formulated?

  1. 18th century

  2. 19th century

  3. 20th century

  4. 21st century


Correct Option: B
Explanation:

Gauss's Law was formulated by Carl Friedrich Gauss in the 19th century.

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