Physics Electrostatics Level: High School
A point charge of 3.5 nC is located at the origin and a second charge of -5.00 nC is located on the x axis at x = 1.5 m. Calculate the electric flux through a sphere centered at the origin with radius 1.0 m. Repeat the calculation for a sphere of radius 2.0 meters.
Physics Electrostatics Level: High School
You have three capacitors , of capacitance 300 pF ,7000 pF ,and 0.001 uF .What maximum capacitance can you from these ?
Physics Electrostatics Level: High School
Determine the magnitude of the electrical force on the electron of a hydrogen atom exerted by the single proton that the atom’s nucleus . Assume the average distance between the revolving electron and the proton is r = 0.51 x 10 to the – 10 m .
Physics Electrostatics Level: High School
An electric field applies a force of 9.11 x 1016 N to an electron emitted from the cathode of a cathode-ray tube at essentially zero velocity . If the field force is constant , find the time required for the electron to reach the screen 20 cm from the cathode ?
Physics Electrostatics Level: High School
Electric forces within an atomic nucleus tend toA. hold it together.
B. push it apart.
C. neither of these.
Physics Electrostatics Level: High School
capacitanceAn air dielectric parallel-plate capacitor and the charging source is not disconnected. A Mica dielectrics is slipped between the plates. What happens?
1) The stored energy increases.
2) The stored energy decreases.
3) The capacitance is decreased and the voltage across the plates is increased.
4) The capacitance is increased and the voltage across the plates is increased.
Physics Electrostatics Level: High School
capacitanceAn air dielectric parallel-plate capacitor and the charging source is disconnected. A Mica dielectric is slipped between the plates. Which of the following happened?
1) The stored energy increases.
2) The stored energy decreases.
3) The capacitance is designed and the voltage across the plates is increased.
4) The capacitance is increased and the voltage across the plates is increased.
Physics Electrostatics Level: High School
capacitanceA parallel- plate capacitor with air dielectric has a plate area of 75 cm^2. If the capacitor is fully charged by a 300-V source and can hold a charge of 7.5 x 10^-9 C, what is the distance between the plates?
(Hint: find C, then C=kE0A/s)1)2.7mm
2)3.1mm
3)5.3mm
4)6.9mm
Physics Electrostatics Level: High School
electrostatic forceThe normal hydrogen atom consists of a proton nucleus and an orbital electron. Assume that the electron orbit is circular and that the consultant distance between the proton and electron is 5.3 x 10^-11 m. What is the orbital speed of the orbiting electron?
(Hint: the centripetal force that keeps the electron in its orbit must equal the force of attraction.)1)1.4 x 10^6 m/sec
2)1.90 x 10^6 m/sec
3)2.19 x 10^6 m/sec
4)3.11 x 10^6 m/sec
Physics Electrostatics Level: High School
electrostatic forceThe normal hydrogen atom consists of a proton nucleus and an orbital electron. Assume that the electron orbit is circular and that the consultant distance between the proton and electron is 5.3 x 10^-11 m. what is the force of attraction between the two fundamental particles?
1)1.77 x 10^-8 N
2)3.35 x 10^-8 N
3)6.18 x 10^-8 N
4)8.20 x 10^-8 N
Physics Electrostatics Level: High School
electric potentialThe parallel cathode and plate of a vacuum tube are 2cm apart and have 120V between them. If the plate current of the tube is 7.5 mA. How much power is dissipated as heat on the plate of the tube?
1) 0.9 W
2) 1.8 W
3) 5.2 W
4) 7.1 W
Physics Electrostatics Level: High School
electric potentialThe parallel cathode and plate of a vacuum tube are 2cm apart and have 120V between them. What is the energy dissipated as heat on the plate?
1)1.89 x 10^-17 J
2)3.21 x 10^-17 J
3)1.11 x 10^-16 J
4)4.00 x 10^-16 J
Physics Electrostatics Level: High School
electric potentialThe parallel cathode and plate of a vacuum tube are 2cm apart and have 120V between them. What is the acceleration of the electron as it reaches the plate?
1)3.71 x 10^ 14 m/sec^2
2)1.04 x 10^15 m/sec^2
3)2.07 x 10^15 m/sec^2
4)3.57 x 10^15 m/sec^2
Physics Electrostatics Level: High School
electric fieldIf q1 were replaced by a charge of -4 x 10^6-6 C, what would be the resultant force exerted on it by the other three charges?
1) 0 N
2) 0.108 N
3) 3.77 N
4) 5.39 N
5) 7.63 N
6) 10.8 N
Question Diagram
Physics Electrostatics Level: High School
electric fieldWhat is the resultant force exerted on charge q1 by the other three charges?
1)0 N
2)0.108 N
3)3.77 N
4)5.39 N
5)7.63 N
6)10.8 N
Question Diagram
