Model Trains & Railroads Tips

Model trains tips, tricks and secrets
Sunday, March 17th, 2013

A toy train runs on a current of 250 mA. It has a resistance of 20 ohms If the train ran for 60 min how much energy did the tain use ? Please show calculations to prove your solution is correct.ThanksAlso if the train uses 9.0V battery and produces a current of 8.0 A what is the resistance of the train ?

The direct current toy train motor watts would be W = I^2 R W = (0.25)^2 * 20 = 1.25 Watts Operating for 60 min it would use 0.00125 kWHr of powerE=I R so R = E/ I Ohms = 9/ 8 = 1.25

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