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HW_5_Solution

# HW_5_Solution - HW 5 Solutions 24-2 The electric potential...

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HW 5 Solutions 24-2 The electric potential difference between the ground and a cloud in a particular thunderstorm is 6.9 x 10 9 V. What is the magnitude of the change in the electric potential energy (in eV) of an electron that moves between the ground and the cloud? Solution: The magnitude is U = e V = 1.2 10 9 eV = 1.2 GeV. 24-4 Two large, parallel, conducting plates are 13 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 3.2 x 10 -15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.) (a) Find the electric field (in N/C) at the position of the electron. (b) What is the potential difference in volts between the plates? Solution: (a) 15 19 4 4 3.9 10 N 1.60 10 C 2.4 10 N C 2.4 10 V/m. E F e (b) V E s 2 4 10 012 2 9 10 4 3 . . . . N C m V c hb g 24-9 An infinite, nonconducting sheet has a surface charge density σ = +6.32 pC/m 2 . (a) How much work is done by the electric field due to the sheet if a particle of charge q 0 = 6.41 x 10 -19 C is moved from the

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