A 200 v lamp has a resistance of 400 ohms. The power rating in watts of lamp is _
Answer (1)
The power rating is 100 Watts.Given:voltage = 200 Vresistance = 400 ohmsAnswer & Solution:For this, we will use Ohm's law.[tex] \sf P = \dfrac{V^{2} }{R} [/tex][tex] \sf P = \dfrac{(200 \: V)^{2} }{400 Ω} [/tex][tex] \sf P = 100 \: W[/tex]
