Explanation Given data: The distance from the metal box to the ground where lightning strikes is 200 m and the current discharges at the rate of 10 11 A/s . Formula used: The formula for emf induced in a conductor is, ε in = d ϕ d t = d ( B ext A ) d t Here, area is constant and the emf is induced by the time varying current. Therefore, ε in = A d B e x t d t = A d d t ( μ o I 2 π d ) = A μ o 2 π d d I d t Here, A is the area of the metal box, d is the distance between metal box and the point on the ground where lightning strikes, d I d t is the rate of change of discharge current. Explanation: Considering the values that are given to us, d I d t = 10 11 A/s And, d = 200 m Area of the metal box of a computer, more commonly known as CPU, is, A = 2 ( 0

College Physics: Explore And Apply, Volume 2 (2nd Edition)

2nd Edition

ISBN: 9780134862910

Author: Eugenia Etkina, Gorazd Planinsic, Alan Van Heuvelen, Gorzad Planinsic

Publisher: PEARSON

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Chapter 21, Problem 63GP

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The maximum value of the emf which is induced around the computer’s metal box when lightening strikes the ground if the discharge current rate is 1011 A/s.

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Chapter 21, Problem 62GP

Chapter 21, Problem 64GP

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Chapter 21 Solutions

College Physics: Explore And Apply, Volume 2 (2nd Edition)

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The maximum value of the emf which is induced around the computer’s metal box when lightening strikes the ground if the discharge current rate is 10 11 A/s .

Solution Summary: The author explains the formula used to determine the maximum value of the emf induced around the computer's metal box when lightening strikes the ground.

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The maximum value of the emf which is induced around the computer’s metal box when lightening strikes the ground if the discharge current rate is 1011 A/s.

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Chapter 21 Solutions