Electrical resistance of certain materials , known as superconductors , changes abruptly from a nonzero value to zero as their temperature is lowered below a critical temperature $T_{c} (0)$ . An interesting property of superconductors is that their critical temperature becomes smaller than $T_{c} (0)$ if they are placed in a magnetic field, i.e., the critical temperature $T_{c} (B)$ is functional of the magnetic field strength B. the dependence of $T_{c}$ (B) on B is shown in the figure.

A superconductor has $T_{c} (0) = 100 K$ . when a magnetic field of 7.5 tesla is applied, its $T_{c}$ decreases to 75 K. for this material one can definitely say that when

Question

Electrical resistance of certain materials , known as superconductors , changes abruptly from a nonzero value to zero as their temperature is lowered below a critical temperature

T_{c} (0)

. An interesting property of superconductors is that their critical temperature becomes smaller than

T_{c} (0)

if they are placed in a magnetic field, i.e., the critical temperature

T_{c} (B)

is functional of the magnetic field strength B. the dependence of

T_{c}

(B) on B is shown in the figure.

A superconductor has

T_{c} (0) = 100 K

. when a magnetic field of 7.5 tesla is applied, its

T_{c}

decreases to 75 K. for this material one can definitely say that when

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