A module is a

Question

A module is a

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Option B: Series parallel arrangement of solar cells

Explanation & Concepts:
A solar module is a factory-assembled unit consisting of a series-parallel arrangement of photovoltaic (PV) solar cells encapsulated in a protective laminate. This configuration is designed to achieve the desired voltage and current output levels required for practical power applications.

Working Principle: Individual solar cells typically generate low voltage (approximately 0.5V to 0.6V). By connecting these cells in series, the output voltage is increased ($V_{total} = \sum V_{cells}$), and by connecting strings of these cells in parallel, the current capacity is increased. The module serves as the primary building block for solar arrays, protecting fragile silicon cells from environmental degradation while providing standard electrical terminals.

Key Formulas: $V_{module} = n_s 	imes V_{cell}$ — total voltage of a module with $n_s$ series cells; $I_{module} = n_p 	imes I_{cell}$ — total current of a module with $n_p$ parallel strings

Key Points: A solar cell is the basic semiconductor device that converts light directly into electricity.; A module protects the cells and provides a robust interface for interconnection.; Multiple modules connected together form a solar panel or array.; Encapsulation (typically EVA) and tempered glass are used to prevent moisture ingress and mechanical damage.

Advantages: Modular design allows for easy scalability of the system capacity.; Standardized voltage and current ratings simplify installation.

Disadvantages: Susceptible to power loss if a single cell or substring is shaded (mismatch loss).; Degrades over time due to UV exposure and thermal cycling.

Applications: Residential rooftop solar installations.; Off-grid standalone power systems.; Utility-scale solar power plants.

Additional Info: Standard commercial silicon modules typically contain 60, 72, or 144 half-cut cells.. Option A is incorrect because a module is an assembled unit, not a single 'newly installed' cell.. Option C is incorrect because a module is specifically designed for, and capable of, power generation.

Answer: B is correct — A solar module is a structured assembly of solar cells connected in series and parallel to provide a usable voltage and current output.

Exam Tip: When calculating total power, remember that series connections add voltages while parallel connections add currents; shading one cell in a series string can significantly drop the total output of the entire module.

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Option A: Newly installed solar cell

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Option C: A series of solar cells when not used for power generation

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Option D: None of the above

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