! Required information A point charge q = −2.00 nC is initially at rest adjacent to the negative plate of a capacitor. The charge per unit area on the plates is 4.40 μC/m² and the space between the plates is 5.80 mm. What is the kinetic energy of the point charge just before it hits the positive plate, assuming no other forces act on it? µJ
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A point charge q = −2.00 nC is initially at rest adjacent to the negative plate of a capacitor. The charge per unit area on the plates is 4.40 μC/m2and the space between the plates is 5.80 mm.
What is the kinetic energy of the point charge just before it hits the positive plate, assuming no other forces act on it?
μJ
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- A uniform electric field of magnitude 9.8x105 N/C points in the positive a direction. Find the change in electric potential energy of a 9.5-μC charge as it moves from the origin to the point (6.0 m, 0). Express your answer using two significant figures. AU = -56 J Submit Correct Important: If you use this answer in later parts, use the full unrounded value in your calculations. Part C Previous Answers Find the change in electric potential energy of a 9.5-μC charge as it moves from the origin to the point (6.0 m, 6.0 m). Express your answer using two significant figures. VG ΑΣΦ AU = Submit Request Answer ? JA uniform electric field of magnitude 7.8x105 N/C points in the positive z direction. Part A Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (0, 6.0 m). Express your answer using one significant figure. IVE] ΑΣΦ AU = Submit Part B AU = Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 0). Express your answer using two significant figures. IVE] ΑΣΦ Submit Part C Request Answer AU = Submit Request Answer w ? Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 6.0 m). Express your answer using two significant figures. [5] ΑΣΦ Request Answer ? w ? J J JNear the surface of the Earth there is an electric field of about 150 V/m which points downward Two identical balls with mass 0 320 kg are dropped from a height of 1.73 m, but one of the balls is positively charged with g 500 C and the second is negatively charged with g500 C Part A Use conservation of energy to determine the difference in the speeds of the two balls when they hit the ground (Neglect al resistance) Express your answer using three significant figures. VE ΑΣΦ Submit A Req ? de Com m/s
- I Review | Constants A cylindrical plate capacitor is constructed with a 0.295 cm radius cylinder surrounded by a thin 0.695 cm radius metallic shell. The two "plates" are 12.8 cm long. Part A What is the capacitance of this cylindrical capacitor? Give your answer in picofarads. (pico = 10-12) C = 8.30 pF Submit Previous Answers Correct Correct answer is shown. Your answer 8.302 pF was either rounded differently or used a different number of significant figures than required for this part. Part B If this capacitor is charged using a 4.30 V battery, what electric field will be measured at the midpoint between the two plates? ? E = 2513 N/C Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remainingA Moving to another question will save this response. Question 2 A particle with a charge of 5.7 µC is 2 cm from a particle with a charge of-2.9 µC. The potential energy of this two-particle system is------ (Note: k = 9 x 10° Nm² /C² ) Do not eneter Unit in your answer field. Enter 3 digits after Decimal. A Moving to another question will save this response. PrtScn Home End PoUpI Review | Cor A 3.0 cm x 3.0 cm parallel-plate capacitor has a 3.0 mm spacing. The electric field strength inside the capacitor is 1.3x105 V/m . Part A What is the potential difference across the capacitor? Express your answer using two significant figures. AV = 390 V Submit Previous Answers v Correct Part B How much charge is on each plate? Enter your answers numerically separated by a comma. Express your answer using two significant figures. Η ΑΣφ ? q1 , q2 = |1.0 • 10-º,1.0 • 10 C O You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer
- Part A The work done by an external force to move a -5.60 µC charge from point A to point B is 1.50x10-3 J. If the charge was started from rest and had 4.72x10-4 J of kinetic energy when it reached point B, what must be the potential difference between A and B? Express your answer with the appropriate units. HẢ ? VB – VA = Value UnitsBR Review | Constants A typical cell has a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outside surface, thus making the cell wall a capacitor. Part A What is the capacitance of a 50-um-diameter cell with a 7.0-nm-thick cell wall whose dielectric constant is 9.0? Because the cell's diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell and think of it as a parallel-plate capacitor. Express your answer to two significant figures and include the appropriate units. HẢ Value UnitsPart A The work done by an external force to move a -7.50 µC charge from point A to point B is 1.40x103 J If the charge was started from rest and had 4 86x10 4 J of kinetiç energy when it reached point B. what must be the potential difference between A and B? Express your answer with the appropriate units. ? VB-VA Value Units
- IP A parallel-plate capacitor filled with air has plates of area 6.6x10-3³ m² and a separation of 0.36 mm. Part A Find the magnitude of the charge on each plate when the capacitor is connected to a 12-V battery. Express your answer using two significant figures. Q= Submit Part B Submit O Increase O Decrease O Stay the same 17| ΑΣΦ | Will your answer to part A increase, decrease, or stay the same if the separation between the plates is increased? Part D Request Answer Part C Complete previous part(s) Q = Submit Request Answer www. ? Calculate the magnitude of the charge on the plates if the separation is 0.83 mm. Express your answer using two significant figures. IV—| ΑΣΦ 3 Request Answer nC ? nCQUESTION 3 What is the capacitance of a parallel plate capacitor in vacuum? Sol. The basic definition for capacitance is: C = Since the electric potential can also be written as V = Ed Where, E is the electric field contribution of the parallel plate (two plane charge): = ol €o Sigma is the surface charge density given by: O= By, substitution, we get the capacitance of the parallel plate to be: C = E0*It takes 13.4 J of energy to move a 13.0-mC charge from one plate of a 17.0-μF capacitor to the other. ▼ Part A How much charge is on each plate? Assume constant voltage. Express your answer to three significant figures and include the appropriate units. Q= 17.5 10 Submit 2 Q Search C Previous Answers Request Answer ? 78