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a 220 volt 60 HZ AC Supply is connected
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to an inductor of 3.5
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Harry what is the current fing through
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the inductor to find the current we will
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i x l where B is is the voltage I is the
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current and XL is the inductive
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XL is equals to 2 5 f
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l now we need to make this B subject of
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the formula which means that the current
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that we need to find I is equals
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to since B is equal to IX
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dividing both sides by XL will give us B
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over x l which is equals to B over 2
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L and this is going to give us B here is
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the voltage which is 220
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over sorry let me write it in the next
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2 pi f l and this is going to give us
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42 * F when we go back here you will see
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that f is 60 HZ which is
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frequency which is 60 here times
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L which is the inductance and L here is
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3.5 remember they are all under 220
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therefore I which is the current is
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equals to when you use your calculator
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220 over this times this times this
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times this is going to give you
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220 all over the whole of this will give
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2 and this is going to give you 220 /
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0 1 6 7 remember that unit of current is
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in ere that is unfair therefore we can
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current I is equals to
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7 ampere which is our final answer
