JEE Advanced 2010Paper 1
- Exam
- JEE Advanced
- Year
- 2010
- Paper
- Paper 1
- Subject
- Physics
- Chapter
- Current Electricity
JEE Advanced 2010 · Paper 1 · Physics · Current Electricity
Paragraph: Electrical resistance of certain materials, known as...
Paragraph:
Electrical resistance of certain materials, known as superconductors, changes abruptly from a non-zero value to zero as their temperature is lowered below a critical temperature . An interesting property of superconductors is that their critical temperature becomes smaller than if they are placed in a magnetic field i.e., the critical temperature is a function of the magnetic field strength . The dependence of on is shown in the figure.
Question: In the graphs below, the resistance of a superconductor is shown as a function of its temperature for two different magnetic fields (solid line) (dashed line). If is larger than , which of the following graphs shows the correct variation of with in these fields?
Question: In the graphs below, the resistance of a superconductor is shown as a function of its temperature for two different magnetic fields (solid line) (dashed line). If is larger than , which of the following graphs shows the correct variation of with in these fields?
Options
- A

- B

- C

- D

Correct answer
A. 
Step-by-step solution
If , critical temperature, (at which resistance of semiconductors abruptly becomes zero) in case-2 will be less than compared to case- 1 .
The correct option is (a).