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(a) An electric bulb is rated at 125 W; 200 V,
What is its resistance?
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Explanation:
Power 125W
Voltage 200V
Resistance ??
P=VI
125= 200 I
I =125/200
I = 0.625A
According To Ohms Law
V=IR
125= 0.625R
R = 125/0.625
R= 200 Ohms
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