7264

Physics Electrostatics Level: Misc Level

[GRR2 16.P.0.18]-/1 points No Response/ Show Detailis

The Styrofoam balls with the same mass m =8.9 10-8 kg and the same positive charge Q are suspended from the same point by insulating threads of length L=0.98 m (the figure below).The separation of the balls is d=0.025m. What is the charge Q?


7263

Physics Electrostatics Level: Misc Level

[GRR2 16.P.015.]-/2 points No Response/Show Details

Three point charges are fixed in place in the right triangle diagrammed below, in which q1=0.65 uC and q2=-0.51 uC. What is the electric force on the +1.0 uC charge due to the other two charges?


7262

Physics Electrostatics Level: Misc Level

A balloon,initially neutral, is rubbed with plastic until it acquires a net charge of 0.53 nC.

(a) Assuming that only electrons are transferred, were electrons removed from the balloom or added to it?

1.removed

2.added

(b) How many electrons were transferred?


7256

Physics Electrostatics Level: Misc Level

Find the voltage change when (a) an electric field does 12 J of work on a 0.0001 -C charge, and when (b) the same electric field does 24 J work on a 0.000 2-C charge.


7249

Physics Electrostatics Level: Misc Level

A lightweight plastic slab is rubbed with a piece of fur. A second plastic slab, hanging from a string, is attracted to the first object and swing towards it. When the second plastic slab touches the first one ,it is suddenly repelled and swings away. Describe the physics of what has happened.


7248

Physics Electrostatics Level: Misc Level

When a stick of some unknown material is rubbed with a cloth, the stick becomes positively charged with a charge of 3uC, Where did this charge come from/ Did the total charge of the universe change when the stick was rubbed?


7247

Physics Electrostatics Level: Misc Level

Object 1 has charge +5c and Object 2 has a charge -3 e. If the two object are separated by 0.20 meters, calculate the magnitude of the electrical force between them.


7246

Physics Electrostatics Level: Misc Level

Sketch the electric field lines near two isolated and equal A.) positive point charges and B.) negative point charges. Include arrowheads to show the field directions.


6245

Physics Electrostatics Level: Misc Level

The energy stored in a 52 micro Farad capacitor is used to melt a 6.0 mg sample of lead. To what voltage must the capacitor be initially charged assuming that the initial temperature of the lead is 20 degrees Celcius.


6244

Physics Electrostatics Level: Misc Level

Determine the capacitance and the maximum voltage that can be applied to a Teflon-filled parallel -plate capacitor having a plate area of 1.75 cm squared and insulation thickness of 0.040 mm.


6239

Physics Electrostatics Level: Misc Level

Four identical point charges (q=+10 micro Coulombs) are located on the corners of a rectangle.The dimensions of the rectangle areL=60 cm and W=15 cm. Calculate the net electric force exerted on the charge at the lower left corner by the three other charges.


6238

Physics Electrostatics Level: Misc Level

Three identical small styrofoam balls (m=2.0g) are suspended from a fixed point by three non -conduting threads, each with a length of 50 cm and with negligible mass. At equilibrium the three balls form an equilateral triangle with sides of 30 cm. What is the common charge"q" carried by each ball?


5408

Physics Electrostatics Level: Misc Level

Metal sphere 1 has a positive charge of 6.00 nC. Metal sphere 2, which is twice the diameter of sphere 1, is initially uncharged. The spheres are then connected together by a long, thin metal wire. what are the final charges on each sphere?Sphere 1? Sphere 2)


5405

Physics Electrostatics Level: Misc Level

The electric potential along the x-axis is V=100x2 V, where x. is in meters. What is Ex at x =0 m? What is Ex at X =1 m?


5368

Physics Electrostatics Level: Misc Level

The potential at a certain distance from a point charge is 600 Volts, and the electric field strength  is 200 N/C (Newtons per Coulomb).

(a) What is the distance to the point charge?

(b) What is the magnitude of the charge?


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