railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Waveguides and Guided Waves Rectangular Waveguide
If a wave is having group velocity of 2 x 108, then what is phase velocity?
1
4.5 × 108 m/s
2
5.5 × 108 m/s
3
9 × 108 m/s
4
6 × 108 m/s