Question 1 Two point charges q a and q b are located on the x-axis at x = a and

Question

Question 1

Two point charges qa and qb are located on the x-axis at x = a and x = b.  From the below graph showing the x-component of the electric field as a function of x, if the magnitude of qb is 3.0 uC, then in uC, the charge on qb is:

Question 2

...and the charge on qa is (in microCoulombs):

Question 3

Two point charges 2.0 cm apart have an electric potential energy -180

Two point charges qa and qb are located on the x-axis at x = a and x = b. From the below graph showing the x-component of the electric field as a function of x, if the magnitude of qb is 3.0 uC, then in uC, the charge on qb is: ...and the charge on qa is (in micro Coulombs): Two point charges 2.0 cm apart have an electric potential energy -180 J. The total charge is 60 nC. What is the negative charge (express your answer in nC). and the positive charge is (in nC): A proton's speed as it passes point A is 20 000m/s. It follows the trajectory shown in the below figure. What is the proton's speed at point B, (in m/s, express as 5.0E9) ? Two spherical drops of mercury each have a charge of 0.15 nC and a potential of 300 V at the surface. The two drops merge to form a single drop. What is the radius of the newly formed single drop (in meters, expressed as 2.0E-4)?

Explanation / Answer

1) Qb=-3.0 uC

2)Qa=3.0 uC

3) let 2 charges q and (60-q) then 9*(10^-3)*q*(60-q)/(2*10^-2)=-180

q*(60-q)=-400
=>q^2-60q-400=0

=>q=66 uC

=>q2=-6

4)q=66 uC

5)

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