GRE Physics Domain 2: Electromagnetism Welcome to your GRE Physics Domain 2: Electromagnetism 1. GRE Physics: Electromagnetism In a region of space, a uniform magnetic field passes perpendicularly through a rectangular loop of wire. If the magnetic field is steadily increasing, what is the direction of the induced current in the loop? A. Clockwise, as viewed from above. B. Counterclockwise, as viewed from above. C. No current is induced. D. The direction of the current depends on the material of the wire. None 2. GRE Physics: Electromagnetism What happens to the capacitance of a parallel-plate capacitor when a dielectric material is inserted between the plates? A. The capacitance decreases. B. The capacitance increases. C. The capacitance remains the same. D. The capacitance becomes zero. None 3. GRE Physics: Electromagnetism What is the magnetic field at the center of a circular loop of wire carrying a steady current? A. Zero B. Directed perpendicular to the plane of the loop C. Directed parallel to the plane of the loop D. Dependent on the radius of the loop None 4. GRE Physics: Electromagnetism How does the frequency of light change as it passes from air into water? A. It increases. B. It decreases. C. It remains the same. D. It becomes zero. None 5. GRE Physics: Electromagnetism Which of the following best describes the principle of superposition in the context of electric fields? A. Electric fields can cancel each other out. B. The net electric field is the vector sum of all individual fields. C. Electric fields always repel each other. D. The strongest electric field dominates over weaker ones. None 6. GRE Physics: Electromagnetism What is the SI unit of magnetic flux? A. Tesla B. Weber C. Henry D. Ampere None 7. GRE Physics: Electromagnetism In an AC circuit containing only a capacitor, what is the phase difference between the current and the voltage across the capacitor? A. 0 degrees B. 45 degrees C. 90 degrees D. 180 degrees None 8. GRE Physics: Electromagnetism What is the self-inductance of a solenoid directly proportional to? A. The square of the number of turns B. The resistance of the wire C. The current flowing through it D. The voltage across its ends None 9. GRE Physics: Electromagnetism What is the main effect of increasing the frequency of an alternating current in a purely resistive circuit? A. The resistance increases. B. The resistance decreases. C. The current increases. D. There is no effect on the current or resistance. None 10. GRE Physics: Electromagnetism Which of the following is true for the electric field inside a conductor in electrostatic equilibrium? A. It is maximum just inside the surface. B. It is zero throughout the conductor. C. It is uniform throughout the conductor. D. It varies inversely with the distance from the surface. None 1 out of 10 Time is Up! Time's up
