What EMF is produced if a waffle iron that draws 2.5 amperes and has an inductance of 560 millihenries is suddenly unplugged, so the current drops to essentially zero in 0.015 seconds

Question

Kyra Booth

Physics

25 February, 16:00

What EMF is produced if a waffle iron that draws 2.5 amperes and has an inductance of 560 millihenries is suddenly unplugged, so the current drops to essentially zero in 0.015 seconds

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Answers (1)

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Kenya · Answer 1

93 V

Explanation:

use the expression for induced emf as

EMF = L dI/dt

L = 560 x 10⁻³

dI = 2.5 A

dt = 0.015 s = 15 x 10⁻³ s

EMF = L dI/dt

= 0.560 * 2.5/0.015

= 93.33 V

≅ 93 V