Superconductors can carry very large currents with no resistance. If a superconducting wire is formed into a solenoid of length 50.0 cm with 250 turns, what is the magnetic field inside the solenoid when the current is 104 A? (µ0 = 4p × 10^-7 T×m/A)
a. 12.6 T
c. 1.25 T
b. 2.50 T
d. 6.28 T
D
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When it is struck by 240-nm photons, a material having a work function of 2.60 eV emits electrons
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