Electromagnetism Quiz

What is the formula for the magnetic field produced by a long, straight, current-carrying conductor?

• B = (r / I) * μ₀

• B = (2πr) / (μ₀ * I)

• B = (μ₀ * I) / (2πr)

• B = (I * r) / μ₀

What is the formula for the magnetic field at the center of a circular current loop?

• B = (2R) / (μ₀ * N * I)

• B = (μ₀ * N * I) / (2R)

• B = (I / N) * (2μ₀ * R)

• B = (N * I) / (2μ₀ * R)

What is the formula for the magnetic field inside a solenoid?

• B = μ₀ * n * I

• B = n / (μ₀ * I)

• B = I * n * μ₀

• B = I / (μ₀ * n)

What is the primary source of magnetic fields generated by moving electric charges?

• Permanent Magnets

• Electric Current

• All of the above

• Moving Charged Particles

What does the Biot-Savart law describe?

• The relationship between resistance and temperature

• The relationship between voltage and current

• The electric field generated by a constant magnetic current

• The magnetic field generated by a constant electric current

What is the force per unit length between two parallel conductors carrying currents I₁ and I₂ separated by a distance r?

• F/L = (μ₀ * I₁ * I₂) / (2πr)

• F/L = (2πr) / (μ₀ * I₁ * I₂)

• F/L = (I₁ * I₂) / (2μ₀ * r)

• F/L = (r / I₁) * μ₀ * I₂

What is the line integral of the magnetic field around any closed loop according to Ampere's Law?

• ∮ B · dl = μ₀I

• ∮ B · dl = μ₀ / I

• ∮ B · dl = I * μ₀

• ∮ B · dl = I / μ₀

What is Ampere's Law particularly useful for calculating?

• None of the above

• Gravitational fields in complex systems

• Electric fields in random configurations

• Magnetic fields in situations with high symmetry

What is the direction of the force between two parallel conductors if the currents flow in the same direction?

• No force

• Attractive force

• Repulsive force

• Depends on the distance

What is the force between coils of wire used to create strong magnetic fields?

• None of the above

• Moving Charged Particles

• Permanent Magnets

• Electromagnets