科学 5 电

以下哪项不是点的来源？

Which of the following is not the sources of electricity?

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上图显示一种交通工具的某个部分。

上述部分的用途是什么？

Diagram above shows a part of a transport.

What is the use of the part of a transport.

• 为车灯提供电能

  Provide electricity for car lights

• 使轮胎自动转动

  Make the tire rotating automatically

• 使煞车器发挥作用

  Make the brakes work

• 把电能转化成动能

  Transform electrical energy into kinetic energy

上图显示一个电路图。

Q元件是什么？

Diagram above shows a circuit diagram.

What is component Q?

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哪项是电路中开关的功用？

Which of the following is function of the switch in the circuit?

• 电流的来源

  The source of the electricity

• 让电流通过的路线

  Let the electricity flow through it

• 连接电路，传导电流

  Connect the circuit, electricity can flow through it

• 控制电路中电流的流通

  Control the flow of the electricity in the circuit

某电源应用水力推动水轮， 提供电能. 那是什么电源？

This energy source uses kinetic energy from water to rotate the turbines to generate electricity . What is the source of energy?

• 太阳电池

  Solar cells

• 蓄电池

  Accumulators

• 可充电电池

  Rechargeable batteries

• 水力发电站

  Hydroelectric power stations

上图显示一个电路。

哪一个 电路图是上图的电路？

Diagram above shows an electric circuit。

Which is the circuit diagram for the electric circuit in diagram above?

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哪项的电路图的灯泡亮度最暗淡？

Which circuit has the dimmest bulbs?

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上图显示一个电路。

如何增加灯泡的亮度？

Diagram above shows an electric circuit.

What can be done to make the bulb brighter?

• 增加开关的数量

  Increase the number of switches.

• 增加电线的长度

  Increase the length of the wire

• 增加灯泡的数量

  Increase the number if bulbs

• 增加干电池的数量

  Increase the number of dry cells

上图中设备的电源是什么?

What is the source of electricity for the devices in diagram above?

• 小型发电机

  Dynamos

• 可充电电池

  Rechargeable batteries

• 太阳电池

  Solar cells

• 蓄电池

  Accumulators

以下哪组配搭是正确的？

Which of the following functions is correct?

• 灯泡 - 提供电能

  Bulb - Supply electricity

• 开关 - 控制电流

  Switch - Control the electricity can flow through

• 电线 - 计算电流

  Wire - Counting the electricity that flows through

• 干电池 - 连接元件

  Dry cell - Connect the electrical components