A photovoltaic array is
combination of solar panels
Understanding Photovoltaic Arrays
A photovoltaic (PV) array is a crucial component in a solar energy system. It is responsible for converting sunlight directly into electricity through the photovoltaic effect. To understand what a photovoltaic array is, let's first define the basic building blocks:
- Solar Cell: This is the smallest unit that produces electricity from sunlight. It is typically a small semiconductor device.
- Solar Module or Solar Panel: A solar module (often referred to as a solar panel) is made by connecting multiple solar cells together, usually in series and parallel, and packaging them into a single, protective unit. This unit generates a useful amount of power.
Now, let's consider how these are combined to form a larger system.
What Makes a Photovoltaic Array?
A photovoltaic array is formed when multiple solar modules (or solar panels) are interconnected. These panels are typically mounted together and wired in series and/or parallel to achieve the desired voltage and current output for a specific application, such as powering a home, building, or a large-scale solar power plant.
Think of it like building with bricks. A single brick is a solar cell. Many bricks put together form a wall, which is like a solar module or panel. Many walls connected together form a building, which is like a photovoltaic array.
Analyzing the Options
Let's look at the given options in the context of our definitions:
- A single solar cell: A solar cell is the basic element, not the entire array.
- A single solar module: A solar module is one unit made of many cells, but an array consists of multiple modules.
- A single solar panel: Similar to a solar module, a solar panel is one unit. An array is a collection of these units.
- Combination of solar panels: This option correctly describes a photovoltaic array as being composed of multiple solar panels (or modules) connected together.
Based on the definitions and the structure of solar energy systems, a photovoltaic array is indeed a combination of multiple solar panels or modules wired together.
Structure of a Solar PV System
A typical grid-tied solar PV system has the following structure:
- Solar Cells → Solar Module/Panel → Photovoltaic Array → Inverter → Grid/Load
This flow clearly shows that the array is built from multiple panels.
| Component | Description |
|---|---|
| Solar Cell | Basic unit converting light to electricity |
| Solar Module/Panel | Multiple cells connected and packaged |
| Photovoltaic Array | Multiple modules/panels interconnected |
| Inverter | Converts DC electricity from array to AC electricity |
Revision Table: Key Solar Terms
| Term | Composition |
|---|---|
| Solar Cell | Semiconductor material |
| Solar Module/Panel | Multiple solar cells |
| Photovoltaic Array | Multiple solar modules/panels |
Additional Information on Photovoltaic Arrays
Photovoltaic arrays are scalable. Their size depends on the required power output. A small system for a residential rooftop might use one array of several panels, while a large solar power plant can consist of thousands of arrays covering acres of land. The panels within an array are typically connected in series to increase voltage and in parallel to increase current, ultimately determining the total power output of the array.
Mounting structures are used to hold the solar panels in an array. These structures can be fixed-tilt, adjustable-tilt, or even tracking systems that follow the sun's path to maximize energy capture throughout the day.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
Consider the following statements:
1. Distance between the longitudes becomes zero on North Pole and South Pole.
2. Distance between the longitudes is maximum on the Equator.
3. Number of longitudes is more than number of latitudes.
Which of the statements given above is/are correct?
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
