Electricity and Magnetism Answers

Prove that the ratio of magnetic energy density and electric energy density is unity.

Will a pendulum clock accurate at room temperature of 30⁰C gain or lose time when the temperature increases at 40⁰C?

Four charges are arranged in a square with one side of the square measuring 0.2m. From upper left going clockwise, q1 = 2µC; q2 = -4µC; q3 = 6µC; and q4 = -8µC. Solve for the amount of electric force experienced by q4 due to the other charges.

four-point charges are located at the corners of a square, 1.00 m by 1.00 m. On each
of two diagonally opposite corners are 1.00 μC charges. On each of the other two
corners are -1.00 μC charges. What is the magnitude of the force on one of the
positive charges?

How much force will act on a moving electron if it is moving 8 m/s in a magnetic field with a strength of 6 T?

Using Ampere's Law, the value of the line integral of B around the closed path shown in the figure below is 11.33 * 10 ^-6 Tm. Show all work and find the value of I3.

Show that the line integral of the electric field E over a closed path is equal to zero.

1. What is the magnitude of the electric force of attraction between an iron nucleus (q = +26e) and its innermost electron if the distance between them is 1.5 x 10–12 m?

Test 2

Explain if it is safe to lie down in an open field while lightning strikes.

An object has an deficiency of 2.0 x 1025 electrons. The order of magnitude for the charge on this object in coulombs is
(1) 25 (2) -19 (3) 6 (4) -45

Proof: Explain your reasoning/show calculations.