A superconducting solenoid is to be designed to generate a magnetic field of 3.50 T. If the solenoid winding has 984 turns/m, what is the required current? (µ0 = 4? × 10^?7 T?m/A)
a. 1.4E+3 A
b. 9.0E+2 A
c. 2.8E+3 A
d. 4.5E+2 A
e. 2.3E+2 A
c
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What is the speed of a proton in a cyclotron having a 0.50 T magnetic field when the proton is at a distance of 25 cm from the center?
a. 
b. 
c. 
d. 
e. 
The most basic definition of life which takes account of the relative importance of the six fundamental properties of living things is that life is something that can
A) grow and develop B) respond to environmental changes C) utilize energy D) reproduce and evolve through natural selection
If electrons were positive and protons were negative, Coulomb's law would be written
A) the same. B) somewhat differently. C) very differently.
A car moving at a constant speed goes around a curve of 400 ft radius and then goes around a second curve of 200 ft radius. The centripetal force acting on the car as it goes around the 200 ft radius curve is ___________ the value of the centripetal force acting on the car as it goes around the 400 ft radius curve
a. one quarter b. one half c. the same as d. twice e. four times