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book Electrical Circuit Theory and Technology 6th Edition by John Bird cover

Electrical Circuit Theory and Technology 6th Edition by John Bird

Edition 6ISBN: 978-1138673496

book Electrical Circuit Theory and Technology 6th Edition by John Bird cover

Electrical Circuit Theory and Technology 6th Edition by John Bird

Edition 6ISBN: 978-1138673496

Exercise 1

An electromagnet exerts a force of 15 N and moves a soft iron armature through a distance of 12 mm in 50 ms. Determine the power consumed.

Explanation

Verified

\text { force } \times \text { distance }=15 \mathrm{~N} \times 12 \times 10^{-3} \mathrm{~m}=0.18 \mathrm{~N} \mathrm{~m} \text { or } 0.18 \mathrm{~J}

\text { Power consumed }=\frac{\text { work done }}{\text { timetaken }}=\frac{0.18 \mathrm{~J}}{50 \times 10^{-3} \mathrm{~s}}=3.6 \mathrm{~J} / \mathrm{s} \text { or } 3.6 \mathrm{~W}

Electrical Circuit Theory and Technology 6th Edition by John Bird

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