本题目来源于试卷: Electric Currents，类别为 IB物理学
[问答题]
One terminal of a car battery is said to be connected tegk cda)f, q2,o “ground.” Since it70g *ynn l/f-gwoa on, is not really connected to thef 0 7*,ln-/oaoywn ggn ground, what is meant by this expression?
参考答案:
The
one terminal of the battery (usually the negative one) is connected to the
metal chassis, frame, and engine block of the car. This means that all voltages used for
electrical devices in the car are measured with respect to the car’s frame. Also, since the frame is a large mass of
metal, it can supply charges for current without significantly changing its
electrical potential.
本题详细解析:
暂无
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