A linear machine shown in Figure 1 has a magnetic flux density of 0.25 T directed...

 

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A linear machine shown in Figure 1 has a magnetic flux density of 0.25 T directed into the page, a resistance of 0.05 Ohm, a bar length I = 0.50 m, and a battery voltage of 200 V. When the switch is open, let the speed of applied on the bar to the right was v = 5 m/s, find the induced voltage across the bar, and T = 30°. Now close the switch and At T= 0°, do the following: 1. Calculate the initial force on the bar and the initial current flow at starting. 2. Calculate the no-load steady-state speed of the bar. 3. Let the bar be loaded with a 25 N opposite to the direction of motion, calculate the new steady-state speed. 4. Calculate the efficiency of the bar under condition in part (3). B =0.25 0.05 x x x X V- 200 X X 0.S m x x x x Figure 1 A linear machine shown in Figure 1 has a magnetic flux density of 0.25 T directed into the page, a resistance of 0.05 Ohm, a bar length I = 0.50 m, and a battery voltage of 200 V. When the switch is open, let the speed of applied on the bar to the right was v = 5 m/s, find the induced voltage across the bar, and T = 30°. Now close the switch and At T= 0°, do the following: 1. Calculate the initial force on the bar and the initial current flow at starting. 2. Calculate the no-load steady-state speed of the bar. 3. Let the bar be loaded with a 25 N opposite to the direction of motion, calculate the new steady-state speed. 4. Calculate the efficiency of the bar under condition in part (3). B =0.25 0.05 x x x X V- 200 X X 0.S m x x x x Figure 1