Physics Electrostatics Level: High School
An uncharged capacitor and a resistor are connected in series to a source of emf. If E = 9.00V, C = 20.0 uF , and R = 100 ohms , find(a) The time constant of the circuit
(b) The maximum charge on the capacitor
(c) The charge on the capacitor after one time constant
Physics Electrostatics Level: High School
A potential difference of 12V is found to produce a current of 40.0 A in a 3.2-m length of wire with a uniform radius of .40 cm . What is(a) The resistance of the wire ?
(b) The resistivity of the wire ?
Physics Electrostatics Level: High School
At 40.0 C , the resistance of a segment of gold wire is 100.0 ohms . When the wire is placed in a liquid bath , the resistance decreases to 97.0 ohms . What is the temperature of the bath ? Hind : First determine the resistance of the gold wire at room temperature , 20 degree C .
Physics Electrostatics Level: High School
If a silver wire has a resistance of 10.0 ohms at 20.0 C , what resistance does it have at 40.0 C ? Neglect any change in length or cross-sectional area resulting from the change in temperature ?
Physics Electrostatics Level: High School
Suppose an electron is released from rest in a uniform electric field whose strength is 5.90 x 10 to the 3rd V/m .(a) Through what potential difference will it have passed after moving 1.00 cm ?
(b) How fast will the electron be moving after it has traveled 1.00 cm ?
Physics Electrostatics Level: High School
(a) How much charge is on each plate of a 4.00 micro F capacitor when it is connected to a 12.V battery
(b) If this same capacitor is connected to a 1.50V battery . What charge is stored ?
Physics Electrostatics Level: High School
A 1megabit computer memory chip contains many 60.0 x 10 -15 F Capacitors . Each capacitor has a plate area of 21.0 x 10 – 12m2 . Determine the plate separation of such a capacitor (assume parallel plate configuration ) The diameter of an atom is on the order of 10-10m =1A . Express the plate separation in angstroms .
Physics Electrostatics Level: High School
The dome of a Van de Graff generator receives a charge of 2.0 x 10 -4C . Find the strength of the electric field(a) Inside the dome;
(b) at the surface of the dome , assume it has a radius of 1.0m ;
(c) 4.0 m from the center of the dome
Hint . Review properties of conductors in electrostatic equilibrium . Also use the fact that the points on the surface are outside a spherically symmetric charge distribution ; the total charge may be considered as located at the center of the sphere .
Physics Electrostatics Level: High School
Find the equivalent capacitance and the charge on each capacitor in the diagram as shown at "click here" , if C1 = 10.0 micro F , C2 = 20.0 micro F, C3 = 30.0 micro F , C4 = 40.0 micro F , and V = 12.0 V .
Physics Electrostatics Level: High School
Consider charges q1 = 1x 10^ -7 C , q2 = 2x 10^ -7 C , q3 = 3x 10^ -7 C , and q4 = 4x10^ -7 C placed at four corners of a square of side 1m , Calculate the potential at the centre of the square . If a charge of 5x10^-7 C is placed at the center of the square , what is its potential energy ?
Physics Electrostatics Level: High School
Consider point charges q1 = q2 =2 micro C , q3 = q4 = -2 micro C . Find the electric field intensity at the center of the square as shown in the figure at "click here" . Each diagonal is of length 2 m .
Physics Electrostatics Level: High School
Two tiny identical metal balls of 10 g each carrying equal positive charges are suspended from 1-m long strings . These balls repel each other and then come to equilibrium making an angle of 37 degree with the vertical as shown in the figure at "click here" . Calculate the charge on each ball .
Physics Electrostatics Level: High School
As per the figure shown at "click here" find the resultant force on charge q3 . If q1 = 130 micro C , q2 = 5.0 micro C , q3 = 4.00 micro C , rl = 0.5 m , and r2 = 0.8m .
Physics Electrostatics Level: High School
A 3.20 micro F capacitor is charged by a 11.0 V battery . It is disconnected from the battery and then connected to an uncharged 4.80 micro F capacitor(see the figure at "click here")a) Determine the total stored energy before the two capacitors are connected
b) Determine the total stored energy after they are connected
c) What is the change in energy ?
Physics Electrostatics Level: High School
A 3.20 micro F capacitor is charged by a 11.0 V battery . It is disconnected from the battery and then connected to an uncharged 4.80 micro F capacitor( see the figure at "click here" )