Pick out the temperature at which iron becomes paramagnetic? a) 800 °C b) 700 °C c) 600 °C d) 500 °C
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Pick out the temperature at which iron becomes paramagnetic?
a) 800 °C
b) 700 °C
c) 600 °C
d) 500 °C
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- My Q is in the picture.In which way do permanent magnets and electromagnets differ? A. Electromagnets can be turned on and off.B. Permanent magnets can only be used in fixed positions.C. Electromagnets can attract other substances besides metals.D. The largest permanent magnets are weaker than the largest electromagnets.Magnetic Forces Problem 19: Suppose a 2.2 T field is applied across a 10-gauge copper wire (2.588 mm in diameter) carrying a 18 A current. What would the Hall voltage be, in microvolts, if the number density of free electrons in copper is 8.34 × 1028m-3.
- Magnetic Forces Problem 19: Suppose a 2.25 T field is applied across a 10-gauge copper wire (2.588 mm in diameter) carrying a 17 A current. What would the Hall voltage be, in microvolts, if the number density of free electrons in copper is 8.34 × 1028m-3.1. In the diagram below, a wire is varying a current. The magnetic field above the wire is into the paper, and the magnetic field below the wire is out of the paper, as shown. What is the direction of the current flowing in the wire? AL (6) x2 x1 12 By = ik hew, 2