1. Estimate the voltage of a student's hand if they experience a shock when their finger is 0.050 mm away from a doorknob. recall that the air breaks down at 3.0 million volts per meter. (150 volts)

2. Plates of 3.45 cm separation are charged to 175 volts. What electric force will be exerted on a 2.00 C placed inside the plates? (0.0101 N)

5. Plates are separated by 2.50 cm and charged to 220 volts. Find the work required for an external agent to move a +1.75 mC charge from the - plate to the + plate. (0.385 J) Use force equations.

3. A proton is accelerated by a voltage of 250. volts. The plates are 5.00 cm apart. Find the final speed of the proton. (2.19 x 105 m/s)

6. Find the charge on the particle shown below (assume the particle is at equilibrium). The particle has mass 1.32 x 10-10 kg. (8.38x10-15C)