本题目来源于试卷: gc textbook chapter 18 Electric Currents，类别为 IB物理学
[问答题]
One terminal of a car battery is saidba ngm71a fl-4 to be connected to “ground.” z1cd81,wtb5 2td4 cg7xeg sqb Since it is not really connected to the ground, whas1475wgd bcxd bt ,z8 tgc2qe1t 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:
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