Electricity and Magnetism Answers

The electric potential at a distance of 0.92m from a point charge is -8.41x10^5 V. what is the

quantity of the point charge?

A disk of radius 1.20cm. It has a charged of -6.0nC spread uniformly over the said

disk. Find the magnitude and direction of the electric field this disk produces at point A on

the axis of the disk a distance of 2.0cm from its center

A 10.0cm long thin glass rod is uniformly charged to +50.0nC. A small bead, charged

-5.0nC is 4.0cm from the center of the rod. What is the force (both magnitude and direction)

on the bead?

Three charges lie along the x-axis. The positive charge q1 = 15.0μC is at x = 2.00m and

the positive charge q2 = 6.00μC is at the origin. Where must a negative charge q3 be placed on

the x-axis such that the resultant force on it is zero?

A satellite orbiting the Earth at 400 km above the surface of the Earth has a 2 m long antenna oriented perpendicular to the Earth's surface. At the equator the Earth's magnetic field is 8×10−5 T and is horizontal. Assuming the orbit to the circular, find emf induced across the ends of the antenna.(Given radius of earth Re ​=6400 Km)

A compact fluorescent lamp (CFL) uses less energy than its equivalent incandescent bulb. How much will a person save if he/she uses a 20 W CFL instead of a 100 W incandescent lamp for 6 hours in 30 days? Electricity is priced at ₱ 8.17/kW.h.

Illustration and solution required- please use the dorsal portion.

12-14. Two like charges of charge +10 nC are placed at the two corners of an equilateral triangle of sice 3cm. What is the magnitude of the total potential at the third corner?

15-17. A point charge q = 2.00μC is located at the origin. Find the electric potential due to this charge at point x = 4.0 m.

How does an electric field and magnetic field affect the kinetic energy of a charged particle moving in free space?

1. A series circuit consisting of 3 resistors R₁ = 8.0Ω, R₂ = 12.0Ω, and R₃ = 4.0Ω is connected to a 24.0 V terminal voltage. a. Calculate the equivalent resistance, b. Calculate the current through each resistor, c. Calculate the potential drop across each resistor.
2. Three resistors are connected in parallel, R₁ = 2.0Ω, R₂ = 5.0Ω, and R₃ = 10.0Ω attached to a 1.25V voltage source. a. Calculate the equivalent resistance, b. Calculate the current supplied by the source to the parallel circuit, c. Calculate the current in each resistor.