Question 4: An electromagnetic wave of frequency 1 GHz travels through an empty space along the z‐direction. At a specific point in space, the electric field E attains a maximum value of 50 V/m.

For Class 12, the exams will commence on February 15, 2025, and conclude on April 4, 2025. As per the schedule, the Class 12 Physics exam is set for February 21, 2025.