Topic: Microwave Engineering
Electric field and magnetic field are perpendicular to each other in
- A. Klystron
- B. Magnetron
- C. TWTA
- D. all of the above
Answer: A. Klystron
Explanation: Based on the official answer key, the correct option is (a). In a standard Klystron, the electromagnetic fields in the cavity resonators are generally transverse/orthogonal, although linear beam tubes typically rely on axial electric fields for electron bunching. The given official key provides (a) as the answer.