Question

1. What is the field strength of an Alpha Particle (2 protons) at a point 1 nanometer away?

2. What is the electric field strength at a point 7m away from a charge of 15?

3. What charge would have a field strength of 1.441x10^-5 N/C at a distance of 1×10^-2m?

4. What force is felt by a le proton 2 nanometers away from a -1e electron?

5. What charge would feel a force of 3×10^-23 N when it is .05m away from a -1e electron?

6. What is the voltage source in Volts on a circuit with a resistance of 500 Ohms that has a current of .1 A?

7. What is the current through a circuit with a 9V battery and a resistance of 600 ohms?

8. What resistance will let 2A of current pass through a circuit with a 50V battery?

9. What is the force of a 1.28×10^-18 C charge on a proton 6×10^-8 m away?

Answer 1

Just use the formulas

Force = kq1q2/r^2

Field = kq/r^2

V = ir

p = I^2r

p = vi

p = v^2/r

q = i*T

where K is the permittivity of free space