MCQOPTIONS
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				| 1. | 
                                    If a and b are the width and height of rectangular wave-guide the cut off wavelength λc for TE20 mode is equal to | 
                            
| A. | a | 
| B. | a + b | 
| C. | a - b | 
| D. | a2 + b2 | 
| Answer» B. a + b | |