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.
0123 
Two equal positive charges are separated by a small distance. Sketch the electric field lines and the equipotential surfaces for this system.
090 
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?
0126 
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 20V intervals from 20 to 100 V, and sketch them to scale. Are these surfaces equally spaced?
095 
(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?
0272 
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?
0177 
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.
00 
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
085 
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.
0130 
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.
098