2610

Physics Electrostatics Level: High School

Capacitor

Find the charge on each capacitor and the voltage across each capacitor .

2243

Physics Electrostatics Level: High School

Two spherical shells have a common center . A +2 x 10^-6 C charge is spread uniformly over the inner shell , which has a radius of 0.1 m . A -5 x 10^-6 C charge is spread uniformly over the outer shell , which has a radius of 0.2 m . Find the magnitude and direction of the electric field at a distance (measured from the common center ) of :

a) 0.05 m

b) 0.15 m

2225

Physics Electrostatics Level: High School

An electron and a proton are 0.53 x 10^-10 m apart .

a) What is their dipole moment if they are at rest ?

b) What is the average dipole moment if the electron revolves about the proton in a circular orbit ?

2215

Physics Electrostatics Level: High School

How much work must be done to bring three electrons from a great distance apart to within 1.0 x 10^-10 m from one another ?

2050

Physics Electrostatics Level: High School

A 15 micro F capacitor is connected to a 50-V battery and becomes fully charged . The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor’s plates after the slab is inserted ?

2047

Physics Electrostatics Level: High School

The battery has a potential difference of V = 10.0 V and the five capacitors each have a capacitance of 10.4 micro F. What is the charge in microcoulombs on (a) capacitor 1 and (b) capacitor 2 ?

2044

Physics Electrostatics Level: High School

An air-filled parallel-plate capacitor has a capacitance of 1.4 pF. The separation of the plates is doubled and wax is inserted between them . The new capacitance is 2.4 pF. Find the dielectric constant of the wax

2039

Physics Electrostatics Level: High School

A positive charge +q is located at the point (x = 0, y = -a) and an equal charge –q is located at point (x = 0, y = +a)

a) Draw a diagram showing positions of the charges.

b) What is the potential at a point on the x axis distance x from origin .

c) Derive an expression for the potential at a point on the y-axis a distance y from the origin.

d)sketch a graph of the potential at points on the y-axis as a function of y in the range of y = -4a to y = +4a . Plot positive potentials upward and negative potential downward .

2025

Physics Electrostatics Level: High School

Three parallel plate capacitors , each having a capacitance of 1.0 micro F are connected in parallel . The potential difference across the combination is 100 V . What is the charge on any one of the capacitors .

a) 30 micro C

b) 100 micro C

c) 300 micro C

d) 1000 micro C

e) 3000 micro C

2019

Physics Electrostatics Level: High School

A parallel plate capacitor has a potential difference between its plates of 1.2 V and a plate separation distance of 2.0 mm . What is the magnitude of the electric field if a material that has a dielectric constant of 3.3 is inserted between the plates ?

a) 75 V/m

b) 180 V/m

c) 250 V/m

d) 400 V/m

e) 500 V/m