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Product name: KX1948 electrical experiment set 2000G
Item no: KX1948
Size: packing size 110*19*150mm
Weight: approx. 60g
Material: battery box 1+ battery 1+ alligator clip 2+ switch 1+ lamp holder 1+ bulb 1+ conductor 2+ paper clip 2+ wire 1+ nail 1..
Color: multicolor
Battery or not: yes
Packing: 240 PCS
Rules: 600 * 450 * 550 mm

Electrical experiment set 2000 g is a battery box of 1 + 1 + 2 + alligator clip wire switch 1 + 1 + 1 + bulb lamp holder pin 2 + 2 + 1 + wire nails (1) composed of a set of scientific laboratory suit, the suit can let students understand our life common function and application of the simple circuit connection, (this product must be used under the supervision of parents or teachers, must pay attention to safety when using) here is the introduction of two experiments.

1. The light bulb is on.

2. Electromagnet course

1. The light bulb is on.

In life, batteries are often used in series. Connect the negative electrode of one battery to the positive electrode of another battery, and the remaining positive and negative electrodes are the positive and negative electrodes of this battery pack. Two, three or more batteries can be connected in this way.
A circuit in which electrical appliances are connected one by one by wires is called a series circuit.
Law of series bulb voltage
Series circuit features
The switch controls the entire circuit at any position, that is, its action is independent of its position. The current has only one path, and the current passing through one lamp must pass through another lamp. If one light is put out, another will be put out.

Scientific principles:
In a series circuit, the current at each resistance is equal, and the sum of the voltages at each resistance is equal to the total voltage of the circuit. It is known that the voltage on each resistance is less than the total voltage of the circuit, so the series resistance is divided.
In a parallel circuit, the voltages at each resistance end are equal, and the sum of the currents at each resistance is equal to the total current (dry current). It can be known that the current on each resistance is less than the total current (dry current), so the parallel resistance is divided. The series and parallel resistance is just like the water flow, the series has only one road, the greater the resistance, the slower the flow, the more branches in parallel, the greater the current.
The battery in series
In life, batteries are often used in series. Connect the negative electrode of one battery to the positive electrode of another battery, and the remaining positive and negative electrodes are the positive and negative electrodes of this battery pack. Two, three or more batteries can be connected in this way.
Scientific inquiry:
Life often see the light in the home and the classroom, after switching on the power can be turned on, how is it bright? Where does electricity come from? So let's do an experiment to see why a light bulb lights up and what the electrical connections look like.

Electromagnet course

Key points of the experiment: students in the campus every day, are listening to the bell on and off the class, the electric bell no one with the hand how to ring? Maybe some of you know it's because of the electromagnet, but how does the electromagnet make the bell sound? Now let's experiment to understand how electromagnets work.

Experimental purpose:

1. Learn to make nail electromagnets
2. Understand the structure of electromagnet and its application in life

Experimental cognition: a device that generates electromagnetism by conducting electricity. On the outside of the core is wound a conductive winding that matches its power. This coil with an electric current is magnetic like a magnet. It is also called an electromagnet. We usually make it into a strip or hoof shape to make the iron core more easily magnetized. Electromagnet is an application of current magnetic effect, which is closely related to life. An electromagnet is a device that generates magnetic force through a current of electricity. It is a nonpermanent magnet and can be easily turned on or off. How an electromagnet works: in a nutshell, it's the magnetic effect of an electric current. When the coil is energized, its inner core is magnetized by a magnetic field that passes through the wire. The magnetized core also becomes a magnet, and the magnetic properties of the tube are greatly enhanced by the superposition of the two magnetic fields. The iron core and the armature in the electromagnet are magnetized and become two magnets with opposite magnetism, generating electromagnetic suction between them. An electromagnet is an electrical device that USES the electromagnetic suction generated by the current carrying iron coil to manipulate the mechanical device to achieve the desired action.

The direction of the magnetic field of an electromagnet can be determined by the ampere rule, also known as the right hand screw rule, which indicates the relationship between the direction of the current and the inductance line of the current-excited magnetic field. (ampere rule 1) : hold the electrified straight wire with your right hand and point your thumb in the direction of the current. The ampere rule (ampere rule two) in the electrified solenoid: hold the electrified solenoid with the right hand, make the four fingers bend and the direction of the current, then the thumb refers to the end of the electrified solenoid N pole. Electromagnet has many advantages: electromagnet magnetism can be controlled by on - and - off current; The magnitude of the magnetism can be controlled by the strength of the current or the number of turns of the coil. Also can change the resistance control current to control the size of the magnetic; Its magnetic poles can be controlled by changing the direction of the current, and so on. Namely: the magnetic strength can be changed, the magnetic whether or not can be controlled, the direction of the magnetic pole can be changed, the magnetic can disappear because of the disappearance of the current.

Do you know the application of electromagnet in life?
1, maglev train 2, electric bell 3, generator 4, motor 5, automatic control device

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   Before assembling, please check whether the circuit is unblocked, whether the circuit accessories are complete and whether each contact point is in good contact. Be careful not to get glue on clothes or skin during assembly. Accessories to be placed in the younger brother and sister can not get the place, so as not to swallow parts by mistake! Don't play on your head in case the model falls off and bumps you!