GRE Subject 2026 Practice Test Physics Electromagnetism Free Quiz 1

1. What is Coulomb's Law?

A. F = Gm₁m₂/r² B. F = ma C. F = kq₁q₂/r² D. E = mc²

2. What is the electric field?

A. E = V/d B. E = kq/r² C. E = -dV/dr D. E = F/q

3. What is the electric potential?

A. E = F/q B. V = PE/q C. F = kq₁q₂/r² D. E = mc²

4. What is Gauss's Law for electric fields?

A. Φ = Q/ε₀ B. Φ = B·A C. ∮E·dl = 0 D. ∮B·dl = μ₀I

5. What produces a magnetic field?

A. Static charges B. Moving charges C. Electric field D. Gravitational field

6. What is the Lorentz force?

A. F = q(E + v × B) B. F = kq₁q₂/r² C. F = ma D. F = Gm₁m₂/r²

7. What is Ampere's Law?

A. ∮E·dl = 0 B. Φ = Q/ε₀ C. ∮B·dl = μ₀I D. Faraday's law

8. What is Faraday's Law?

A. ∮B·dl = μ₀I B. Φ = Q/ε₀ C. F = q(E + v × B) D. ∮E·dl = -dΦ_B/dt

9. What is the speed of light in terms of μ₀ and ε₀?

A. c = 1/√(μ₀ε₀) B. c = μ₀ε₀ C. c = √(μ₀/ε₀) D. c = √(ε₀/μ₀)

10. What is the Biot-Savart law?

A. F = qvB B. ∮B·dl = μ₀I C. Φ = B·A D. dB = (μ₀/4π)(Idl × r̂)/r²