Electricity and Magnetism Answers

An object having a mass of 10 g and a charge of + 8.0x10^-5 C is placed in an electric field defined by Ex = 3.0x10^3 N/C, Ey = - 6000 N/C, and Ez = 0. (a) What are the magnitude and direction of the force on the object? (b) If the object starts from rest at the origin, what will be its coordinates after 3.0 s?

Consider the following situation shown below. A mass, m = 1.8 kg, is hung from a conducting wire shaped into a loop. The dimensions of the loop are 2m x 1.8m. Part of the loop is in a region where a uniform magnetic field (B = 1.6T) is into the page everywhere.

If there were a current in the wire loop,

a) which direction would the current have to flow in order for the wire to be at rest and not fall? Show your work and explain your reasoning.

b) what would the magnitude of the current have to be in order for the wire

This link below provides the picture for this question.

https://dropmefiles.com/7SMOw

A charged dust particle with a mass of 8.48 (10-15) kg is suspended between two horizontal charged plates subject to a 240 V electric potential difference. [4T]

a) Create an FBD (free-body diagram) for the dust particle.  Label all forces, including magnitudes.

b)The dust particle was charged due to friction, which caused electrons to be removed from the particle.  Determine how many electrons were lost due to the friction, creating the charge on the particle.

In a particle accelerator, an electron is fired horizontally into an electric field between 2 charged plates at a speed of 2.0 (106) m/s.  It enters the field halfway between the 2 plates that are separated by 40 mm.  The electric field has a strength of 3000 N/C.  Determine the distance the electron will travel horizontally before it hits one of the plates.

1. A wire that is 40 cm long is parallel to a 0.67-T uniform magnetic field. There is 5.6 A current through the wire. How much force acts on the wire?

2. A high-speed electron having a mass of 9 × 10−31𝑘𝑔 is moving at right angle to 0.75-T magnetic field and has a speed of 2.5 × 107𝑚/𝑠. What is the size of the force acts on the high-speed electron? What is the magnitude of acceleration of the particle?

3. A metal banana-shaped earring has a net charge of -2.0 µC while a metal apple-shaped earring has a net charge of 8.0 uC. The earrings are 3.0 m apart. (A) What is the electric force between the two earrings? Is it attractive or repulsive? (B) The two earrings are brought together, touching one another for a few seconds, after which the earrings are once again placed 3.0 m apart. What is the electric force between the two earrings now? Is it attractive or repulsive?

Consider the following situation shown below. A mass, m = 1.8 kg, is hung from a conducting wire shaped into a loop. The dimensions of the loop are 2m x 1.8m. Part of the loop is in a region where a uniform magnetic field (B = 1.6T) is into the page everywhere. (Each part 10 pts; 20 pts total)

https://ibb.co/1nG4v5v

If there were a current in the wire loop,

a) which direction would the current have to flow in order for the wire to be at rest and not fall? Show your work and explain your reasoning.

b) what would the magnitude of the current have to be in order for the wire to be at rest and not fall? Show your work and explain your reasoning. Use an additional sheet if necessary.

Parallel connection solve for the total capacitance, total charge and individual charge.

C1 = 6.31 x 10^-12

C2 = 3.75 x 10^-12

C3 = 7.23 x 10^-12

V = 1400 V

Series connection solve for the total capacitance, total charge and individual voltage.

C1 = 3.5 x 10^-12

C2 = 2.4 x 10^-12

C3 = 1.13 x 10^-12

V = 1700 V