railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Waveguides and Guided Waves Rectangular Waveguide

यदि एक तरंग में समूह वेग 2 x 108 है, तो चरण वेग क्या है?

1

4.5 × 108 m/s

2

5.5 × 108 m/s

3

9 × 108 m/s

4

6 × 108 m/s

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