Is the electric light bulb a resistor or a conductor in the circuit?
Resistance is also a conductor, ah, electrical materials can only be divided into conductors and insulators according to their electrical conductivity, and semiconductors are actually conductors. But if it is divided according to the function of the component, it will be more.
No, an electric lamp is equivalent to a resistor in a circuit. The difference between an electric lamp and a wire is that the resistance of the lamp is not equal to zero, while the resistance of the wire is zero. Therefore, the electric lamp can not be equivalent to the function of wire in the circuit diagram.
The light bulb is a resistance, but it is not painted as a resistance symbol. The light bulb has a prescribed drawing method, one X in a circle, which is an engineering regulation. Just abide by it. The resistance of the wire in your usual calculation can be ignored, but when the calculation circuit is heated, the loss of power on the power line can not be ignored.
Right. In a broad sense, anyone who relies on the resistance of matter to generate work can be regarded as a resistor.
What is the composition of the circuit?
The circuit is mainly composed of power supply, load, control device and wire, as shown in figure 1-1. A power supply is a component that provides energy for a circuit.
Circuit: a closed loop composed of power supply, wire, switch and electrical appliances. Among them, the power supply: provides the electric energy; the wire: transmits the electric energy; the switch: controls the circuit or the electrical appliance to turn on and off; the electrical appliance: consumes the electric energy. Circuit: a conductive circuit composed of metal wires and electrical and electronic components, called a circuit.
The circuit consists of four parts: power supply, conductor, control device and load. A conductive circuit consisting of metal wires and electrical and electronic components is called a circuit. The simplest circuit consists of power loads, wires, switches and other components connected in a certain way, providing the overall path for charge flow.
The circuit consists of four parts: power supply, load, connecting wire and auxiliary equipment. The practical application of the circuit is more complex, therefore, in order to facilitate the analysis of the essence of the circuit, the symbol is usually used to represent the actual original part of the circuit and its connection line, that is, the so-called circuit diagram. Among them, the wire and auxiliary equipment are collectively called the intermediate link.
Circuit: a conductive circuit composed of metal wires and electrical and electronic components, called a circuit. Adding a power supply to the input of the circuit causes the potential difference at the input, and the circuit can work when the circuit is connected.
Is the light bulb a power component?
1. The electronic equipment is made of power supply, conductor, control element and so on. The light bulb belongs to the output component, and the output energy is output in the way of light and heat.
2. Power supply: provide the electric energy needed by the circuit. Wire: the transmission of electrical energy from the power supply to other components in the circuit. Switch: controls the on and off of the current in the circuit. Resistor: used to adjust the resistance value in the circuit. Light bulb: an element that converts electrical energy into light energy. Motor: a component that converts electrical energy into mechanical energy.
3. Resistance. There are many examples of electric heaters, such as electric stoves, rice cookers, electric blankets, electric irons, electric railways and so on. Incandescent lamps use high temperatures to glow in an incandescent state, but they do not use the heat emitted, but the light they emit. Therefore, I think from a functional point of view, it is not an electric heating element. It’s just a personal understanding.
4. The light bulb is a pure resistive element. Instead of converting electrical energy into light energy, electrical energy is converted into thermal energy, which is then converted into light energy. We don’t look at its final result, but whether it converts directly from electrical energy to thermal energy, so the electric light bulb is a pure resistive element, which is suitable for Ohm’s law.
5. The electric light bulb is the most commonly used lighting appliance, which is generally made of tungsten wire, halogen and other materials. Incandescent bulbs are filled with gas and heated with resistance wires. The structure of the light bulb is mainly divided into three parts, filament, glass bulb and power supply.
What are electric lights, fans, motors and doorbells in the circuit?
According to Baidu encyclopedia, the device that consumes electricity in the circuit is called electrical appliance (also called load). It is a device that uses electric energy to work. Other appliances such as lights, televisions or resistors. The function of electrical appliances is to convert electrical energy into other forms of energy.
Power supply and electrical appliances: the power supply is the device that provides electricity in the circuit, and the electrical appliance is the device that consumes electric energy.
Batteries and generators are all power sources and light bulbs. An electric motor. The doorbell is all electric. Power supply, electrical appliances, plus wires, and often switches, make up the circuit. There is current in the circuit only when the circuit is closed.
What is the common fluorescent lamp circuit usually made of?
The fluorescent lamp is composed of lamp tube, ballast, glow starter and capacitor. The function of each part: the fluorescent tube is a glass tube, the inner wall is coated with a layer of phosphor (magnesium tungstate, calcium tungstate, zinc silicate, etc.), different phosphors can emit different colors of light.
The lighting circuit of fluorescent lamp is mainly composed of fluorescent tube, ballast and starter. A fluorescent tube is a glass tube that is pumped into a vacuum and then filled with a certain amount of argon and a small amount of mercury. Each end of the tube is equipped with a filament that can emit a large number of electrons when electrified. The tube is coated with phosphor (so it sometimes becomes a fluorescent lamp).
Lamp, ballast, glow starter. Fluorescent lamp is mainly composed of lamp tube, ballast and start-up glow. The lamp is filled with a small amount of inert gas. Fluorescent lamp, also known as fluorescent lamp.
Components: lamp bead, circuit board (usually aluminum substrate), drive power supply, aluminum alloy shell, pc diffusion cover, plug.
Bracket (plastic, metal), drive circuit, LED, PCB substrate (printed circuit board, high-power aluminum substrate), wire (high temperature resistant silicone wire for power), connector (connected with standard lamp holder) lamp holder, so there are lamp beads and power supply and shell in the main place.
