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Chapter 6: Problem 1

A device transforming solar energy directly into electricity is called a ..\ldots...

Short Answer

Expert verified
The device is called a photovoltaic cell.

Step by step solution

01

Identifying the Key Term

In the exercise, we need to identify the name of a device that converts solar energy directly into electricity. The keyword here is 'directly into electricity.'
02

Recalling the Specific Device

Recall from physics that the device specifically designed for converting solar energy directly into electrical energy is called a photovoltaic cell or solar cell.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Solar Energy
Solar energy is one of the most abundant and sustainable energy sources available to us. It is the energy that comes from the sun, which is both clean and renewable. Every day, the sun sends enormous amounts of energy to the earth in the form of sunlight.
  • Solar energy can be harnessed using various technologies, such as solar panels and solar thermal collectors.
  • This energy can be used for heating, lighting, electricity generation, and even for powering vehicles.
Solar energy is advantageous because it reduces dependency on fossil fuels, which are limited and cause pollution. By utilizing solar energy, we can decrease greenhouse gas emissions and help combat climate change.
Electricity Conversion
The conversion of solar energy into electricity is a fascinating process. This transformation is primarily achieved through devices known as photovoltaic cells, commonly referred to as solar cells.

How Conversion Works

When solar cells are exposed to sunlight, they convert the light energy into electrical energy. Here's how it happens:
  • Photons from the sunlight hit the solar cell.
  • These photons excite the electrons in the solar cell.
  • The movement of these electrons generates an electric current.
This current can then be used to power electrical devices or stored in batteries for later use. This efficiency in converting sunlight directly into electricity is pivotal in making solar technology practical and effective.
Solar Cell
A solar cell, also known as a photovoltaic cell, is a semiconductor device that captures sunlight and converts it into electricity. These cells are the fundamental building blocks of solar panels.

Components of a Solar Cell

Solar cells consist mainly of silicon, which is a semiconductor material. They have several layers that work together during the electricity conversion process:
  • A top layer, usually made of silicon, where light absorption occurs.
  • A bottom layer to complete the circuit.
  • Metal conductive plates on the sides to transfer the generated electricity.

Application and Usage

Solar cells are utilized in a variety of applications such as residential solar panels, solar farms, and space satellites. They are a critical technology in the sustainable energy sector, supporting worldwide efforts towards cleaner energy.

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