Question

1. A parallel plate capacitor has a charge on one plate of q = 1.8E-06 C. Each square plate is d1 = 1.4 cm wide and the plates of the capacitor are separated by d2 = 0.25 mm. The gap is filled with air, εo = 8.85 × 10-12 C2/Nm2.

a. What is the voltage between the plates, ΔV, in V?

b. What plate width would double this voltage, in centimeters?

2. Consider two points in an electric field. The potential at point 1, V₁, is 44 V. The potential at point 2, V₂, is 175 V. An electron at rest at point 1 is accelerated by the electric field to point 2.

Find the numerical value of v₂ in m/s.

3. In the Bohr model of a hydrogen atom, the electron travels in circular orbits around the proton.

What is the electric potential, in volts, due to the proton in an orbit with radius 0.530 × 10^–10 m?

Answer 1