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Question: 

If the current to a motor drops by 12%, by what factor does the output torque change?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$\tau_f = 0.88 \tau_i$

Giancoli 7th Edition, Chapter 20, Problem 52

(1:17)

Chapter 20, Problem 52 is solved.

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