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What causes an electric current (amperes) to
flow in a wire?
什么导致电流（安培）在导线中流动？
What are the analogies to voltage, current, and
resistance in a closed water circuit?
在封闭的水循环中，电压、电流和电阻的类比分别是什么？
What is Ohm's Law?
欧姆定律是什么？
What is the voltage law? Draw the analogy
to the behavior of a water circuit.
什么是电压定律？绘制水路行为的类比。
What is the current law? Draw the analogy
to the behavior of a water circuit.
什么是电流定律？将这种行为与水路的类比进行比较。
How is the electric power calculated
in a DC circuit?
如何在直流电路中计算电功率？
How do you determine the equivalent
resistance of two resistors in series?
in parallel?
如何确定两个电阻的等效电阻？串联？并联？
How do you determine voltages and currents
for two resistors in series? in parallel?
如何确定两个电阻的电压和电流？是串联还是并联？
How can you measure electric resistance
with a voltmeter and ammeter?
如何用电压表和电流表测量电阻？
What is meant by emf?
什么是电动势？
How do you calculate voltage and current in
a circuit which has more than one loop?
如何计算具有多个回路的电路中的电压和电流？
Describe the charging of a capacitor by
a battery.
描述电池对电容器的充电过程
What is meant by the time constant in
capacitor charging?
电容器充电时所指的时间常数是什么？
Describe the discharge of a capacitor.
描述电容器的放电过程
Elements of practical electric circuits
实用电路的基本要素
Describe the basic layout of standard U.S. household
wiring systems. Why are there two high voltage or
"hot" wires?
描述标准美国家庭布线系统的基本布局。为什么会有两条高压或'火线'？
Why are standard U.S. receptacles "polarized" with
one wide prong and one narrow prong?
为什么标准的美国插座被称作‘极化’的，因为其中一个插脚较宽，另一个较窄？
What is the function of a fuse or circuit breaker?
保险丝或电路断路器的作用是什么？
What is the function of a ground wire?
接地线的作用是什么？
If the ground wire is broken, what indication of this
will you get from the operation of the appliance?
如果地线断开，你从电器的运行中会得到什么指示？
Is household wiring in series or parallel? Why?
家庭电路是串联还是并联？为什么？
Why is it that a small amount of corrosion on an auto
battery terminal can prevent the engine from starting?
为什么汽车电池接头上的少量腐蚀会阻止发动机启动？
If the auto won't start and you suspect the battery,
are the headlights and horn operation a good test of
the battery's strength?
如果汽车无法启动，你怀疑是电池问题， headlights 和喇叭的运作是否能作为电池性能的良好测试？
Why is it that a battery may test at normal voltage
even when it is too spent to supply appreciable
power to a circuit?
为什么电池在电量耗尽无法为电路提供显著功率时，仍可能显示正常的电压？
What is meant by a "short circuit"? an "open circuit"?
什么是‘短路’？什么是‘开路’？
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