Physics Electrostatics Level: High School
A square has sides of 2.0 cm with a charge of +15.0 micro C at one corner (a) and with charges of -5 micro C at the remaining three corners (b , c and d) .a) Find the electric field at the centre of the square
b) Find the potential at the centre of the square
Physics Electrostatics Level: High School
Sketch a graph of the electric potential between x = 0.00 and x = 5.00 mm for the parallel plate capacitor as shown in the figure at "click here"
Physics Electrostatics Level: High School
A proton is fired from far away toward the nucleus of a mercury atom . Mercury is element number 80 , and the diameter of the nucleus is 14.0 fm . If the proton is fired at a speed of 4.00 x 10^7 m/s , what is its closest approach to the surface of the nucleus ? Assume the nucleus remain at rest .
Physics Electrostatics Level: High School
What is the escape speed of an electron launched from the surface of a 1.00 cm diameter plastic sphere that has been charged to 10.0 nC ?
Physics Electrostatics Level: High School
What is the electric potential at point A, the centre of the triangle of charges shown in the figure at "click here".
Physics Electrostatics Level: High School
A proton with an initial speed of 8.00 x 10^5 m/s is brought to rest by an electric field .a) Did the proton move into a region of higher potential or lower potential ?
b) What was the potential difference that stopped the proton ?
Physics Electrostatics Level: High School
The electric field strength is 2.00 x 10^4 N/C inside a parallel- plate capacitor with 1.00 mm spacing . An electron is released from rest from the negative plate . What is the electron's speed when it reaches the positive plate ?
Physics Electrostatics Level: High School
Wire A and B are made of the same material , but the radius of wire A is twice that of wire B . If the same current flows in wires A and B , how much bigger/smaller are the following quantities in wire A compared with wire B: electric field , electron flow , current density ?
Physics Electrostatics Level: High School
A 10.0 uF capacitor is charged to 25.0 V . It is then connected in series with an uncharged 4.00 uF capacitor. The series combination is finally connected to a 60 V battery.a) What is the new potential difference across the 10.0 uF capacitor ?
b) What is the charge on the 4.00 uF capacitor ?
Physics Electrostatics Level: High School
Three capacitors of 8 uF , 6 uF and 10 uF are connected in series . when the series arrangement was charged by being attached to a voltage supply , the voltage across the 6 uF capacitor was 5.0 V .a) What was the supply voltage ?
b) What was the energy stored in the series capacitor circuit ?
Physics Electrostatics Level: High School
A parallel plate capacitor has a plate area of 126 square centimeters and a plate separation of 0.58 mm . Half the area between the plates is filled with Teflon . The other half is filled with air .a) When 20 V is applied , what is the charge on this capacitor ?
b) What is the maximum voltage that can be applied to the capacitor ?
Physics Electrostatics Level: High School
A charge of 5.0 nC is placed at the origin and another charge of -9.4 nc is placed at x = 26.0 cm.a) Where on the x axis is the resulting electrical potential (voltage) is equal to zero volts ?
Physics Electrostatics Level: High School
An alpha particle , starting from rest, acquired a speed of 1.38 x 10 m/s while moving through an electric potential difference .a) What was the magnitude of the electric potential ?
b) The final energy of the alpha particle , in electron volts , what was eV ?
Physics Electrostatics Level: High School
A 10 cm diameter metal sphere produce an electric field of 5,000 N/C towards the sphere at a point 25 cm the surface of the sphere.a) What is the charge on the sphere ?
b) What is the voltage at the centre of the sphere ?
Physics Electrostatics Level: High School
Two point charges are placed on the x-y plane at the coordinates : q1 = +4 nC at (15 cm, 10 cm) and q2 = -6 nC at (-10 cm, 10 cm).a) The voltage at the origin is what ?
b) The force on a 3 nC placed at the origin is what ?
