"Let more light bulbs light up" PPT

Description

Qingdao version of third grade science volume 2, let more light bulbs light up PPT

Part One: Small Electric Lamps Using Lamp Holders

① Connect a wire to both ends of the battery box and install the battery in the battery box.

② Touch the other ends of the two wires connected to the battery to the small bulb to make the small bulb glow.

③Install the small light bulb on the lamp holder and connect the wires.

Light up more light bulbs

think:

1. There are 2 small light bulbs, 2 small light bulb holders, 1 battery box and 1 dry cell each, and 4 wires. How to connect the light bulbs to light up?

Let more light bulbs light up PPT, Part 2: Experimental process

Let two small light bulbs light up

Process: Current flows from the + terminal of the battery to the first bulb and then to the second, and finally to the - terminal of the battery, forming a path.

Think: Where can’t something go wrong?

Nothing can go wrong, and no path can be formed if it is disconnected or malfunctions.

Let more light bulbs light up PPT, part 3: The circuit is faulty

4. The circuit is faulty

(1) What will go wrong (check the various reasons why the small light bulb does not light up)

(2) Make a circuit detector

(3) Safety warning: Do not use the detector to detect household 220V electrical circuits

Give it a try

(1) Collaborate with the same group to explore and compare which group has the most ways to connect;

(2) Each time a light comes on, record it with a picture;

Let more light bulbs light up PPT, part 4: in-depth instruction

In-depth remarks:

1. Connect several conductors end to end and connect them to the circuit. This connection method is called series connection, and the circuit formed in this way is called a series circuit.

2. Connect one end of several conductors together and the other ends together, and then connect the two ends to the circuit. This connection method is called parallel connection, and the circuit thus connected is called a parallel circuit. The electrical appliances in the home are all connected in parallel circuits, and the traffic lights on the road are also connected in parallel circuits.

3. When the number of batteries is the same, two bulbs connected in series emit light in the circuit, and two bulbs connected in parallel emit light in the circuit.

4. In a simple circuit, when two batteries are connected, the light bulb will be brighter than when only one battery is connected.

Let more light bulbs light up PPT, Part 5: Classroom training

1. Fill in the blanks:

1. In the same circuit, two or more electrical appliances are connected end to end. This circuit is called a (series) circuit.

2. In the same circuit, there are two or more electrical appliances, each of which is controlled by a different switch. This kind of circuit is called a (parallel) circuit.

3. When connecting two batteries, the (positive) terminal of one battery must be connected to the (negative) terminal of the other battery.

4. When the number of battery cells is the same, two light bulbs connected in series emit light (dark) in the circuit, and two light bulbs connected in parallel emit light (bright) in the circuit.

Second, short answer:

1. Given a battery, a light bulb, a switch and enough wires, can you connect them into the simplest circuit? Draw its circuit diagram.

(Methods to make small light bulbs light up include series connection and parallel connection)

Answer: (Draw several sections for the battery. There are no wires connecting the batteries)

2. There are two main ways of connecting circuits: series circuit and parallel circuit.

3. A series circuit is a connection method in which all the components in the circuit are put into a series. A parallel circuit is a circuit in which electrical appliances are connected side by side.

Keywords: Qingdao version third grade science PPT courseware for the second volume free download, let more light bulbs light up PPT download, .PPT format;

For more information about the PPT courseware "Let More Light Bulbs Light Up", please click the Let More Light Bulbs Light Up ppt tab.

"Let more light bulbs light up" PPT courseware:

Qingdao version of the second volume of third grade science, let more light bulbs light up PPT courseware, the first part: review review 1. A complete circuit mainly includes four parts: _____, _____, and _____. 2. Which of the following things does not use electricity? ( ). A. use..

File Info

Update Time: 2024-09-07

This template belongs to science courseware Qingdao Edition Third Grade Science Volume 2 industry PPT template

Preview