Solar cell problem

1. The laptop uses DC power

2. The power of the laptop is about 70W. To power the laptop, the solar cell should be about 100W., the area is about 1 square meter, varies with efficiency drums. A common approach is to create a solar power supply and configure it with a battery, to ensure a stable power supply for the laptop. The thickness of the battery panel is very small, generally only about 6mm without the frame, and the frame is generally 35 or 50mm thick

3. Solar cells can be arranged in any way, as long as they are arranged in any way. There are circuits to connect them, and the spacing must be large. This is not serious, but the effectiveness is reduced

4. He is not afraid of water and has a high level of protection. He can resister to the ravages of wind and rain for 25 years outdoors. Most people aren't afraid to stand on it, but they are afraid of hammers and the like hitting it. This is mainly determined by the characteristics of the tempered glass on top. layer of the battery panel.

It is not impossible to use solar energy to power laptops, but the cost is very high and the portability is very poor.

Solar panels are affected by temperature, and it is better to work below which degree

(1) When charging a cell phone battery, the Electrical energy is then converted into chemical energy. time, the cell phone battery is quite suitable for electrical appliances. Solar panels can directly convert light energy into electrical energy;

(2) The motor drives the propeller to rotate. Its main principle of applicationwe are that the live conductor moves under the effect of a force in the magnetic field.

So the answer is: electricity; chemistry ; electrical appliances; live conductors move under the influence of a force in a magnetic field.

An experimental group used the experimental method of measuring the volt-ampere characteristic curve of a small light bulb to explore the entirety of a solar cell when there is no light (no d 'stored electrical energy)

The plus It is preferable to work at room temperature of 20 degrees of course. My impression of photovoltaics is that it is exposed to direct sunlight, which is impossible even if the temperature is not high.

Solar panel is a device that absorbs sunlight and converts solar radiation energy directly or indirectly into electrical energy by photoelectric effect or efphotochemical effect. The main material of most solar panels is “silicon”.

Structural composition

It is used for bonding and fixing tempered glass and the main body of power generation (such as battery cells). The quality of transparent EVA material directly affects the service life. of the component. EVA is prone to aging and yellowing, which affects the light transmission of the module and thus affects the power generation quality of the module. In addition to the quality of the EVA itself, the module manufacturer's lamination process also has an effect. Significant impact.

(1) According to the measurement and mapping of the volt-ampere characteristic curve of the small bulb, the voltage and current should be measured from zero. The sliding rheostat adopts a voltage. -Split connection method. The circuit connection is as shown in the figure.

(2) When the tension is less than 2.00 V, the figure shows that the current is very small, as shown by I=

When the voltage is 2.80V, read I=2.80×10-3A according to the question image, and R=

So the answer is: (1) As shown in the figure. (2) Very large. (3)1.0×103．