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WAEC - Physics (1993 - No. 37)
In a purely resistive a.c. circuit, the current I = I
o
sin wt and voltage, V = V
o
sin wt. Calculate the instantaneous power dissipated in the circuit in time t.
I
o
V
o
2I
o
V
o
sin wt
(I
o
V
o
)/2
I
o
V
o
sin
2
wt
I
2
o
V
2
o
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