Showing 441 to 450 of 631 Questions
  • Sketch the electric field lines and the equipotential surfaces both near and far from the conductor shown in Figure(a), assuming that the conductor carries some chargeQ.

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    123
  • Two equal positive charges are separated by a small distance. Sketch the electric field lines and the equipotential surfaces for this system.

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    90
  • An infinite plane of charge has surface charge density 3.5 μC/m2. How far apart are the equipotential surfaces whose potentials differ by 100 V?

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    126
  • A point charge q = + 1/9 × 10–8 C is at the origin. Taking the potential to be zero at r = ∞, locate the equipotential surfaces at 20-V intervals from 20 to 100 V, and sketch them to scale. Are these surfaces equally spaced?

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    95
  • (a) Find the maximum net charge that can be placed on a spherical conductor of radius 16 cm before dielectric breakdown of the air occurs. (b) What is the potential of the sphere when it carries this maximum charge?

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    272
  • Charge is placed on two conducting spheres that are very far apart and connected by a long thin wire (Figure). The larger sphere has a diameter twice that of the smaller. Which sphere has the largest electric field near its surface? By what factor is it larger than that at the surface of the othersphere?

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    177
  • Charge is placed on two conducting spheres that are very far apart and connected by a long thin wire. The radius of the smaller sphere is 5 cm and that of the larger sphere is 12 cm. The electric field at the surface of the larger sphere is 200 kV/m. Find the surface charge density on each sphere.

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    0
  • Two identical uncharged metal spheres connected by a wire are placed close by two similar conducting spheres with equal and opposite charges as shown in Figure. (a) Sketch the electric field lines between spheres 1 and 3 and between spheres 2 and 4. (b) What can be said about the potentials V1, V2, V3, and V4 of the spheres? (c) If sphere

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    85
  • An electric field is given by E = axi, where E is in newtons per coulomb, x is in meters, and a is a positive constant. (a) What are the SI units of a? (b) How much work is done by this field on a positive point charge q0 when the charge moves from the origin to some point x? (c) Find the potential function V(x) such that V = 0 at x = 0.

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    130
  • Two positive charges +q are on the y axis at y = +a and y = –a. (a) Find the potential V for any point on the x axis. (b) Use your result in (a) to find the electric field at any point on the x axis.

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    98