Sign In

JEE Advance - Physics (2010 - Paper 1 Offline - No. 19)

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). An interesting property of superconductors is that their critical temperature becomes smaller than Tc(0), if they are placed in a magnetic field, that is, the critical temperature Tc(B) is a function of the magnetic field strength B. The dependence of Tc(B) on B is shown in the figure.

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). An interesting property of superconductors is that their critical temperature becomes smaller than Tc(0), if they are placed in a magnetic field, that is, the critical temperature Tc(B) is a function of the magnetic field strength B. The dependence of Tc(B) on B is shown in the figure.

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). An interesting property of superconductors is that their critical temperature becomes smaller than Tc(0), if they are placed in a magnetic field, that is, the critical temperature Tc(B) is a function of the magnetic field strength B. The dependence of Tc(B) on B is shown in the figure.

In the graph below, the resistance R of a superconductor is shown as a friction of its temperature T for two different magnetic fields B1 (solid line) and B2 (dashed line). If B2 is larger than B1 which of the following graphs shows the correct variation of R with T in these fields?
IIT-JEE 2010 Paper 1 Offline Physics - Magnetism Question 13 English Option 1
IIT-JEE 2010 Paper 1 Offline Physics - Magnetism Question 13 English Option 2
IIT-JEE 2010 Paper 1 Offline Physics - Magnetism Question 13 English Option 3
IIT-JEE 2010 Paper 1 Offline Physics - Magnetism Question 13 English Option 4

Explanation

From the given figure, Tc(B) is a monotonically decreasing function of B. Thus, B2 > B1 implies Tc(B2) < Tc(B1). Hence resistance with B2 will become zero at lower temperature in comparison to B1.

Comments (0)

Advertisement