A) \[{{10}^{4}}W\]
B) \[10W\]
C) \[2.5W\]
D) \[5W\]
Correct Answer: C
Solution :
Voltage amplitude\[{{V}_{0}}=100V\], current amplitude\[{{i}_{0}}=100mA=100\times {{10}^{-3}}A\]and phase difference between\[i\]and\[V\]is\[\phi =\frac{\pi }{3}={{60}^{o}}\]. Now power dissipated is given by \[P=\frac{{{V}_{0}}{{i}_{0}}}{2}\cos \phi =\frac{100\times 100\times {{10}^{-3}}}{2}\times \cos {{60}^{o}}\] \[=2.5W\]You need to login to perform this action.
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