Change set

Pick exam & year, then Go.

Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q115 (NDA-I/2026) Science & Technology › New Materials, Energy & Environment-linked Tech

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?

Result
Your answer: —  Â·  Correct: C

Explanation

Photovoltaic (PV) cells rely on specific semiconductor materials to convert sunlight into electricity. Tellurium (II) is a vital component in Cadmium Telluride (CdTe) thin-film solar cells. Gallium (IV) is used in high-efficiency solar technologies such as Copper Indium Gallium Selenide (CIGS) and Gallium Arsenide (GaAs) cells. In contrast, Neodymium (I) and Dysprosium (III) are Rare Earth Elements (REEs) used primarily to manufacture high-strength permanent magnets. These magnets are critical for the generators in wind turbines and motors in electric vehicles (EVs), but they are not used in the semiconductor layers or the direct production of photovoltaic cells for solar panels. Therefore, minerals I and III are the ones not used in PV cell production.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
28%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

IAS · 2020 · Q2 Relevance score: 0.22

Consider the following minerals : 1. Bentonite 2. Chromite 3. Kyanite 4. Sillimanite In India, which of the above' is/are officially designated as major minerals ?

NDA-II · 2010 · Q32 Relevance score: -2.32

Consider the following items. I. Proteins, carbohydrates and fats II. Vitamins III. Minerals IV. Water Which of the above are considered as the constituents of food?

CDS-I · 2003 · Q104 Relevance score: -3.12

Consider the following substances : I) Pectin II) Lignin III)Cutin ' IV) Chitin Which of these substances occur in plant cell wall?

IAS · 2001 · Q11 Relevance score: -3.20

Consider the following organisations : I. Atomic Minerals Directorate for Research and Exploration II. Heavy Water Board III. Indian Rare Earths Limited IV. Uranium Corporation of India Which of these is/are under the Department of Atomic Energy ?

IAS · 1998 · Q44 Relevance score: -3.95

Consider the following : I. Tughlaquabad Fort. II. Lodi Garden. III. Qutub Minar. IV. Fatehpur Sikri. The correct chronological order in which they were built is :