SOLUTION: The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 1/5 ampere when the resistance is 21875 ohms. What is the current wh

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Question 1000199: The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 1/5 ampere when the resistance is 21875 ohms. What is the current when the resistance is 42875 ohms?
Answer by ikleyn(52787) About Me  (Show Source):
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The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 1/5 ampere when the resistance is 21875 ohms. What is the current when the resistance is 42875 ohms?
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The condition states that  I = U%2FR,  where  U = const.  (By the way,  physically   U is electric potential difference across the resistance).

In other words,  the product  I*R  is the constant value  U.

Therefore,  you have an equation

1%2F5.21875 = x*42875.

where  x  is the unknown current.  Hence,

x = %281%2F5%29%2A%2821875%2F42875%29 ampere.