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Energy and Power

Q1:

A 220  resistor dissipates 3 W. The voltage is

A 73.3 V

B 2.5 V

C 25.7 V

D 257 V

ANS:C - 25.7 V

P Vxl.
P VxV/R.
3w = v^2/22O.
V^2 = 660,
V = √ 660,
V = 25.690v.



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