PH 122 Lecture : Current and Voltage

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lemondog142

28 Feb 2014

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Document Summary

Handle on one end, two wires come out of other. The voltage that is put out by the genecon is roughly proportional to the speed that you turn the crank. If you need a higher voltage, just crank faster. By cranking the genecon at a constant speed, you can apply a constant voltage to your circuit. The current that is put out by the genecon is roughly proportional to the force necessary to turn the crank. If you have to apply more force, then more current must be flowing. Though the voltage you apply will be fairly constant, the amount of current that can flow will depend entirely on the resistance attached to your circuit. You generally do not control the amount of current flowing through your circuit.

Related Questions

1)As shown in the figure, a uniform conducting rod of length 0.40 m and mass 0.075 kg is in rotational equilibrium about the hinge at point O. A uniform magnetic field of 0.23 T is directed out of the plane of the page, perpendicular to the rod. Due to a battery and wires not shown, there is a current of 4.0 A in the rod directed toward point O. Determine the angle θ.

2)As shown in the figure, a conducting rod with a length of 0.79 m is placed on a horizontal frictionless surface and attached to a power supply by two springs, each with a spring constant of 81 N/m. The springs are initially at their equilibrium length and are in a region where there is a uniform magnetic field of 0.17 T that is perpendicular to the frictionless surface when the power supply supplies a current that causes the wire to move in such a direction that the two springs are stretched.