A 240-volt d.c. motor on brake test took 52 Amp when running at 1500 rpm. The spring

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A 240-volt d.c. motor on brake test took 52 Amp when running at 1500 rpm. The spring balance at the end of the 76 cm brake arm reads 93.5 N. What is the efficiency of the motor at this load?

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Conceptual Physics

ISBN: 978-0321568090

11th edition

Authors: Paul G. Hewitt

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Posted Date: Oct 08, 2020 10:48 AM

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A 240-volt d.c. motor on brake test took 52 Amp when running at 1500 rpm. The spring

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solution 2 x x N 60 2x x1500 60 157 rads Force on drum ... View the full answer

Conceptual Physics

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