MCQ
$........$ Charge is produced by friction
- ✓Stationary.
- BNo.
- CAttractive.
- DAll.
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$E = 3.1\,NC^{-1}\,cos\,[\,(1.8\,rad\,m^{-1})\,y + (5.4\times 18^8\,rad\,s^{-1})\,t\,]\,\hat i$
The wavelength of this part of electromagnetic wave is......$m$

