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NDA General Ability General Studies 2026 NDA 2026 (Phase 1)

NDA General Ability Question (2026) — Solution

Question

Consider the following critical minerals: I. Neodymium II. Tellurium III. Dysprosium IV. Gallium Which of the above minerals are not used for the production of photovoltaic cells used in solar panels?

Options

  1. A. I and IV
  2. B. II and III
  3. C. I and III
  4. D. II and IV

Answer

C. I and III

Step-by-step solution

Neodymium (I) and Dysprosium (III) are rare earth elements primarily used in the manufacturing of strong permanent magnets, which are essential for wind turbines and electric vehicle motors. They are not used in the production of photovoltaic cells. Tellurium (II) is a key component in cadmium telluride (CdTe) thin-film solar cells. Gallium (IV) is used in the production of copper indium gallium selenide (CIGS) and gallium arsenide (GaAs) solar cells. Thus, Neodymium and Dysprosium are not used for the production of photovoltaic cells. Answer: I and III

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