Question 4 (0.5 points) How many excess electrons can be counted in a rubber rod

Question

Question 4 (0.5 points) How many excess electrons can be counted in a rubber rod of - 2 '0.00001 nano Coulombs of charges? Your Answer: Answer Save Question 5 (0.5 points) A metal ball hs 5 Coulomb of charge. fit receives 0 5010%20 number of electrons, what vill be the resuftant charge of the balt? Your Answer Answer units Save Question 6 (1 point) 2 equal charges are seperated by 41 mm and experiences a repulsion force of 9 Newton. Calculate the amount of each charge in micro Your Answer Answer units Save

Explanation / Answer

Here ,

4)

number of excess electrons = charge/charge on 1 electron

number of excess electrons = (-2 * 0.00001 * 10^-9)/(-1.602 *10^-19)

number of excess electrons = 124844

the number of excess electrons is 124844

5)

resulatant charge = initial charge + charge received

resulatant charge = -5 - 0.50 * 10^20 * (1.602 *10^-19)

resulatant charge = -13 C

the new charge is -13 C

6)

let each charge is q micro C

force = k * q^2/d^2

9 = 9 * 10^9 * (q * 10^-6)^2/0.041^2

q = 1.3

q = 1.3 uC

the charges are 1.3 uC

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