two physics questions, One true and false. One multiple choice. Will rate the be
ID: 1328185 • Letter: T
Question
two physics questions, One true and false. One multiple choice. Will rate the best answer
A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery. For 1 PPC l he ap actanice and to is the Stored energy)Answer the rolovwing questions regarding the creac tor Chargied by a naterny. or of acn state nent cetow, s eleat Tiut er sfarsd. energy.) Answer the following questions regarding the capacitor charged by a battery. For each statement below, select True or False. TrueAfter being disconnected from the battery, increasing d decreases V. FaseAfter being disconnected from the battery, inserting a dielectric with K will decrease V. False After being disconnected from the battery, inserting a dielectric with k will increaseC False After being disconnected from the battery, inserting a dielectric with K will decrease U FalseWith the capacitor connected to the battery, increasing d increases U. True After being disconnected from the battery, decreasing d decreases C.Explanation / Answer
2.
here
the formula of the drift velocity
I = n * A * v * Q
I = Q / t
2.11 * 10^20 * 1.6 * 10^-19 / 8.31 = 5.9 * 10^28 * 3.14 * 0.0022^2 * v * 1.6 * 10^-19
v = ( 2.11 * 10^20 * 1.6 * 10^-19) / ( 8.31 * 5.9 * 10^28 * 3.14 * 0.0022^2 * 1.6 * 10^-19)
v = 2.83 * 10^-2 mm/s
so the correct answer is F .2.83 * 10^-2 mm/s
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