Q1) Two 1.7 cm-diameter disks face each other, 2.8 mm apart. They are charged to 16 nC.

A. What is the electric field strength between the disks?Express your answer to two significant figures and include the appropriate units.

B. A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?

Q2) A parallel-plate capacitor is formed from two 3.7 cm-diameter electrodes spaced 1.9 mm apart. The electric field strength inside the capacitor is 2.010^6N/C2.

A. What is the magnitude of the charge (in nCnC) on each electrode?

Q3) Two circular disks spaced 0.50 mmapart form a parallel-plate capacitor. Transferring 1.30 10^9 electrons from one disk to the other causes the electric field strength to be 3.90 10^5N/C.

A. What are the diameters of the disks?

Q4) Two 12 cm -long thin glass rods uniformly charged to +18nC are placed side by side, 4.0 cm apart. What are the electric field strengths E1, E2, and E3 at distances 1.0 cm, 2.0 cm, and 3.0 cm to the right of the rod on the left, along the line connecting the midpoints of the two rods? Specify the electric field strengths of E1, E2, E3.

Q5) The electric field strength 5.0 cm from a very long charged wire is 3000 N/C . A. What is the electric field strength 10.0 cmcm from the wire? Q6) Suppose Q1 = 5.0 nC and Q2 = 7.0 nC