Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2026
A compass needle made of paramagnetic alloy is used at a location where the angle of dip is π/3. When the alloy is slightly cooled below the room temperature, the needle's vertical deflection increases, even though the Earth's magnetic field remains unchanged. Which one of the following best explains this observation?
- A Paramagnetic susceptibility increases as temperature decreases.
- B The dip angle of the Earth's magnetic field increases when temperature drops.
- C Cooling increases the needle's moment of inertia making it more sensitive to vertical torque.
- D Cooling decreases the needle's thermal agitation, converting the material into a ferromagnet.
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
GEO2026
Consider the following magnetic materials at room temperature
- Gadolinium oxide
- Bismuth
- Ruthenium
- Graphite
- Aluminium
- Nickel
Which of the following statements is/are correct in respect of the above magnetic materials?
- There are two diamagnetic materials
- There are three paramagnetic materials. Select the answer
using the code given below.
- A I only
- B II only
- C Both I and II
- D Neither I nor II
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
GEO2026
Which one of the following materials is strongly paramagnetic due to the presence of unpaired f-electrons and is widely used in MRI contrast agents?
- A Lead
- B Gadolinium
- C Bismuth
- D Platinum
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
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