MCQ
Seven resistances are connected as shown in the figure. The equivalent resistance between A and B is


- A3 W
- ✓4 W
- C4.5 W
- D5 W

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Assertion $A$: The phase difference of two light waves change if they travel through different media having same thickness, but different indices of refraction.
Reason $R:$ The wavelengths of waves are different in different media.
In the light of the above statements, choose the most appropriate answer from the options given below


