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For ultrasonic wave generation, on application of external magnetic field, the
natural frequency of the rod changes
applied frequency of the rod changes
cross-sectional area of the rod changes
length of the rod changes
length of the rod changes
Practice and solve "For ultrasonic wave generation, on application of external magnetic field, the..." for Electrical - Electrical Materials. The correct answer is Option D: length of the rod changes. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(d) **