help me solve:

1.Consider three point charges located at the corners of a right triangle as shown in Figure, where q1=q3= 5.00 C, q2 = - 2.00 C, and a = 0.100 m. Find the resultant force exerted on q3. what is F3x and F3y

2.Three point charges lie along the x axis as shown in the figure. the positive charge q1=15c is at x=2 m, the positive charge q2 =6 c is at the origin, and the net force acting on q3 is 0. What is the x coordinate of q3? x=

3.A test charge of + 1 3 C is at a point P where an external electric field due to other charges is directed to the right and has a magnitude of 4 10 ^6 N/C . If the test charge is replaced with a charge of - 3 C , what happens to the external electric field at P? 1. its unaffected.2.it reverses directions.3. changes in a way that cant be determined.

4.an electron enters the region of a uniform electric field as shown in figure with vi=3.00 * 10^6 m/s and e=200n/c. the horizontal length of the plates is l=0/100m.a.Find the acceleration of the electron while it is in the electric field.

b.Assuming the electron enters the field at time t=0 find the time at which it leaves the field.c. Assuming the vertical position of the electron as it enters the field is yi=0,what is the vertical position when it leaves the field.

5.an insulating sphere of radius a has a uniform volume charge density p and carries a total positive charge Q.a. Write the equation for the electric field point outside the sphere. b. write the equation for the electric field at a point inside the sphere.

6.A proton is released from rest in a uniform electric field with a magnitude of 8.010^4V/m. The proton undergoes a displacement of magnitude d=0.50m in the direction of E.Find the speed of the proton after completing the displacement.v=

7. An electric dipole consists of two charges of equal magnitude and opposite sign separated by a distance 2a as shown in Figure 25.13. The dipole is along the x axis and is centered at the origin. a. write the equation of the electric potential P on the y axis. b.write the equation of the electric potential at point R on the x axis.

8.Three resistors are connected in parallel as shown in Figure 28.7. A potential difference of 18 V is maintained between points a and b. (a). calculate the equivalent resistance of the circuit (b) Find the current in each resistor. (c) Calculate the power delivered to each resistor and the total power delivered to the combination of resistors.p1= 3.00 , p2=6.00 , p3=9.00 .

9.a single -loop circuit contains two resistors and two batteries as shown in figure. (Neglect the internal resistances of the batteries) find the current in the circuit. E1= 6.0 V. R2= 10 R1=8.0 . E2= 12 V

10.An uncharged capacitor and a resistor are connected in series to a battery as shown, where = 12.0 V, C = 5.00 F, and R = 8.00 10^5 . The switch is thrown to position a. Find the time constant of the circuit b. find the maximum charge on the capacitor c. the maximum current in the circuit d. with these values complete the correct equations for q(t) and i(t).