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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 TC(0)T_C(0). An interesting property of superconductors is that their critical temperature becomes smaller than TC(0)T_C(0) if they are placed in a magnetic field i.e., the critical temperature TC(B)T_C(B) is a function of the magnetic field strength BB. The dependence of TC(B)T_C(B) on BB is shown in the figure.Paragraph: Electrical resistance of certain materials, known as superconductors, changes abruptly from a non-zero value
Question: In the graphs below, the resistance RR of a superconductor is shown as a function of its temperature TT for two different magnetic fields B1B_1 (solid line)andB2and B_2 (dashed line). If B2B_2 is larger than B1B_1, which of the following graphs shows the correct variation of RR with TT in these fields?

Options

  1. AIf you change the stoichiometric coefficients in a chemical equation, how does it affect the equilibrium constant
  2. BIf you change the stoichiometric coefficients in a chemical equation, how does it affect the equilibrium constant
  3. CIf you change the stoichiometric coefficients in a chemical equation, how does it affect the equilibrium constant
  4. DIf you change the stoichiometric coefficients in a chemical equation, how does it affect the equilibrium constant

Correct answer

A. If you change the stoichiometric coefficients in a chemical equation, how does it affect the equilibrium constant

Step-by-step solution

If B2>B1B_2>B_1, critical temperature, (at which resistance of semiconductors abruptly becomes zero) in case-2 will be less than compared to case- 1 . ∴\therefore The correct option is (a).
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