Two parallel conducting rails with negligible resistance are 41.0 cm apart and are connected together at one end by an 18.8Ω resistor. A conducting bar, also with negligible resistance, is free to slide along the rails. The system is in a region where a 315 mT magnetic field points perpendicular to the plane of the rails, as shown in (Figure 1). If the bar is pulled along the rails at 5.69 m/s, what's the current in the circuit comprising the rails, the resistor, and the moving bar?
Here induced current = induced voltage/Resistance
= rate of change of flux/R
= BLv/R
= 0.315*0.41*5.69/18.8
= 0.03909 A answer
Two parallel conducting rails with negligible resistance are41.0 {\rm cm} apart and are connected together...
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