Charges
A plastic rod is rubbed against a wool shirt, thereby acquiring a charge of -0.80 uC. This is how many electrons are transferred from the wool shirt to the plastic rod.
What is 5.0 * 1012 electrons?
The potential at the center of a 4.0cm diameter copper sphere is 500 V, relative to V = 0 V at infinity. This is the excess charge on the sphere.
What is 1.1 nC?
A point charge, q = 2.0 uC is at the center of an imaginary sphere that has a diameter of 1.0 m. This is the flux of the electric field through the imaginary sphere.
What is 2.26 * 105 Nm2/C ?
A parallel-plate capacitor has square metallic plates of edge length 10 cm, separated by 1mm. This is the capacitance of the device.
What is 89 pF?
The Italian tenor who sang the duet "Time To Say Goodbye" with Sarah Brightman, one of the most beautiful songs of all time, come at me bro.
Who is Andrea Bocelli?
Two point charges, q1 = 2.0 pC and q2 = -2.0 pC are separated by 4.0 um. This is the magnitude of their dipole moment.
What is 8.0 * 10-18 Cm?
An electric field is given by the expression E = bx3 i(hat), where b = 2.00 kV/m4. This is potential difference between the point x = 1.00m and x = 2.00 m.
What is -7.50 kV?
The electric flux through one side of a cube that has a single point charge of -3.0 uC placed at its center.
What is -5.65*104 Nm2/C?
Ceq = C1 + C2 is an example of how capacitance adds when they are connected in this way.
What is parallel?
In the ancient Egyptian mummification process, all the organs were removed from the body except this one.
A dipole of moment 0.50 enm is placed in a uniform electric field that has a magnitude of 4.0 * 104 N/C. This is the magnitude of the torque on the dipole when it makes an angle of 30 degrees with the field.
What is 1.6 * 10-24 Nm?
A -5.0 uC point charge is located at x = 4.0 m, y = -2.0 m, and a 12 uC point charge is located at x = 1.0 m, y = 2.0 m. This is the magnitude and direction of the electric field at x = -1.0 m, y = 0.
What are 13 kN/C and 230 degrees?
A non-conducting thin spherical shell of radius 6.0 cm has a uniform surface charge density of 9.0 nC/m2. This is the magnitude of the electric field 2.0 cm away from the sphere's center.
What is zero?
An isolated conducting sphere that has a 10.0cm radius has an electric potential of 2.00kV (the potential far from the sphere is zero). This is how much charge is on the sphere.
What is 22.3 nC?
One of the first African-American women to work for NASA as a mathematician, who passed away 2 weeks ago at age 101.
Who is Katherine Johnson?
A fixed point charge of 2q is connected by strings to a point charge of q and 4q as shown (Carin will now draw a diagram). These are the tensions in the strings 1 and 2 (note: answers will be in variable format).
What are T1 = 3kq2/d2 and T2 = 9kq2/d2 ?
An infinite line charge of linear charge density 1.5 uC/m lies on the z axis. Assume we choose V = 0 at a distance of 2.5m from the line of charge. Then, this is the potential at r = 4.0 m from the line of charge.
What is -12.7 kV?
A non-conducting thin spherical shell of radius 6.0 cm has a uniform surface charge density of 9.0 nC/m2. This is the magnitude of the electric field 10.0 cm away from the sphere's center.
What is 366 N/C?
A parallel plate, air gap capacitor has a capacitance of 0.14 uF. The plates are 0.50 mm apart, and the positively charged plate has a charge of 3.2 uC. This is the maximum energy the capacitor can store before the dielectric breakdown of the air between the plates occurs. (Note: you'll need to google something for this one).
What is 0.16 J?
Northwestern's official motto (in English).
100 extra points for Latin.
What is "Whatsoever things are true"?
Or, "Quaecumque Sunt Vera"