UCF PHY2054 Post Lab - Unit 07 Magnetic Fields Due to Currents 1. Consider a point 1.0 cm away from a long, straight wire. For each case below, give the current that is needed to generate listed magnetic field strength. a. Surface of the Earth- 5X10T b. Refrigerator magnet- 5x10 T c. Laboratory magnet- 0.1 to 1 T d. Superconducting magnet- 10 T

5.0 m/s 10 cm A potential difference of 0.050 V is developed across the 10-cm-long wire of the above figure as it moves through a magnetic field perpendicular to the page. What are the strength and direction (into the page or out of the page) of the magnetic field?

Two identical coils of wire are connected to different power supplies. The current in coil A is 0.50 A. The current in coil B is 0.25 A. Which coil produces the largest magnetic field? Select one: a. Coil A produces the largest magnetic field because it has the highest current. b. Coil A produces the largest magnetic field because it has the lowest resistance. c. Coil B produces the largest magnetic field because it has the largest resistance. d. Coil B produces the largest magnetic field because it has the lowest current.

DETAILS OSUNIPHYS1 28.6.P.049. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The cross-sectional dimensions of the copper strip shown are 2.0 cm by 2.0 mm. The strip carries a current of 200 A, and it is placed in a magnetic field of magnitude 8 = 2.4 T. What are the value (in V) and polarity of the Hall potential in the copper strip? (Assume the charge carrier density of copper is 8.0 x 1028 electrons/m³). B 18. value polarity + The -Select- of the strip is at a higher potential. Additional Materials. Reading 2.0 cm X 2.0 mm Submit Answer