Electricity and Magnetism Answers

A voltage of 200v is connected across a capacitor of capacitance of 2.5uf . calculate the charge deposited on each plate.

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1)A rod of length(, located along the y-axis has a total charge Q and a uniform linear charge density (. Find the electric potential at a point located on the x-axis a distance x from the origin.

At what distance from the central axis of a long straight thin wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 × 10^-5 T? (μ0 = 4π × 10^-7 T ∙ m/A)

There is an electric field at point P, A very small charge isplaced at this point and experiences a force. Another very small charge is then placed at this point and experiences a force that differs in both magnitude and direction from that experienced by the first charge. How can these two different forces result from the single electric charge that exsists at point P?

The uniform fields shown in Figure 5.18 are near a dielectric–dielectric boundary but on opposite sides of it. Which configurations are correct? Assume that the boundary is charge free and that epsilon 2 > epsilon 1.

The relaxation time of mica (sigma = 10^-15 S/m, epsilon r = 6) is

(a) 5 x 10^-10 s

(b) 10^-6 s

(c) 5 hr

(d) 10 hr

(e) 15 hr