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ZX-D92B4E4D18Linear inequalities in one or two variables · 第 10 题
Linear inequalities in one or two variables · 原库模块 1 · Q10 原库参考解析
\( I=\frac{V}{R} \)
The formula above is Ohmʼs law for an electric circuit with current I, in amperes, potential difference V, in volts, and resistance R, in ohms. A circuit has a resistance of 500 ohms, and its potential difference will be generated by n six-volt batteries that produce a total potential difference of 6n volts. If the circuit is to have a current of no more than 0.25 ampere, what is the greatest number, n, of six-volt batteries that can be used?
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