1. A negative test charge -qo is located relative to positive charges 9₁ and 92 as shown in figure. Find the electrostatic potential energy of go. H -do D (+ 92
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- 1. What is a correct expression for the potential energy of the charge configuration illustrated below? Assume the sphere (of radius R) is uniformly charged. C b 92 kQq kQq, kq,q, А. + + R+а R+b kQq kQq, kq 42 + В. (R+а)? (R+b)? kQq,, kQq, , kq,q, C. + + b a kQq D. a? kq 92 + kQq,, kQq, + ? a Е.particle of charge = 7uC is located on the -axis at the point = 5.1 cm. A second particle of charge = -4uC is placed on the -axis at = -3.4 cm. Take Coulomb's constant k as. Calculate the net electric potential at the origin. O A. -2240000 O B. None of the other three options OC. 204000 O D. -26400009. A total charge of 3.00 uC/m is uniformly spread over a ring with a 0.400 meter radius. What is the value of the electric potential 0.300 meters above the ring, along the axis of symmetry? そ? O A. 22.7 kV O B. 41.8 kV O C. 63.6 kV OD. 85.1 kV Qこ2trd = 24(4)(3*10) Q: 7.5 VI0 V = K Vっ13.5 Wu
- bpositive charge +90 moves from 1 to 2 along the dashed line, what is the sign of the work done on +90 by the +Q charge? 10. A Zero B Positive C Negative1. An eletrostatic paint sprayer consists of a charged metal sphere. Charged paint droplets (the sign the same as the metal sphere) are shot towards the metal sphere using a paint gun. The paint droplets repel and move towards a grounded object that needs to be painted. In the figure below, an electrostatic paint sprayer has a 0.3 m diameter metal sphere at a potential V sphere of 25 kV that repels paint droplets onto a grounded wall. Vwall=0 (a) What charge is on the sphere? C Qsphere 9 drop paint drop repelled to the wall Vsphere с (b) What charge must a 0.1 mg drop of paint have to arrive at the object with a speed of 8 Electrostatic Paint Sprayer
- 912,0NC 93=+8.0C. what is the netckctric potential at port P? 4.am 64.0cm 5.0cm 92--5.0uC.Find the potential at points P₁, P2, P3, and P4 in the diagram due to the two given charges. 3 +5 mC 4 cm- Hint P₁ Figure Description T 3 cm a. Potential at P₁ = b. Potential at P2 = c. Potential at P3= d. Potential at P4= Submit Question 4 P -2 cm 2 cm3 cm 4 cm- % ● P2₂ (Yes, these numbers are quite large because even one millicoulomb is quite a large amount of charge. Use the "E" notation to enter your answers in scientific notation, if necessary, e.g. "3.14E12" for 3.14 x 10¹2.) 5 V V V V -10 MC G Search or type URL 6 & 7 * 00 8 9QUESTION 3 Which of the following statements is the correct equation for conservation of mechanical energy for a point charge, q, and mass, m, moving with a speed, v, through a potential difference, V - V in an electric field? f 1 mv? + qV,=-mv² + qV, а. b. 1 ,2 2 2 O c. 1 mv¸+qV +qV i f d. 1 1 mv?+ V 2 * V,=-mv² + V f 2 f Imv?+ V = -mv? +V, е. 2 f
- A particle, Q, with a charge of +10.8 nC is isolated from all other charged objects. Point A is 1.1 cm to the right of the charge. Point B is 1.1 cm below the charge. Point C is 3.9 cm to the left of the charge. a. What is the electric potential at points A, B, and C? b. What is the potential energy of an electron at each point in eV and joules? c. If an electron is placed at rest at point C, what will be the force on and acceleration of the electron (magnitude and direction)?10. You need a coaxial cable that can hold ± 62 nC/m of charge density. Someone hands you a cable with a 2.0 mm diameter inner conductor and 1.6 cm outer conductor (see diagram at right). The maximum potential difference the cable will tolerate is 2 kV. Will this cable work for your application? a-2. An electronic flash for a camera uses a capacitor to store energy. With a potential difference of 300V, the charge on each plate has a magnitude of 0.0225C What is the capacitance of the flash? If this is a parallel plate capacitor of area 10m?, what is the plate separation? How much energy is stored by the capacitor? а. b. С.