Electricity and Magnetism Answers

A charge is particle is force to move in electric field will an always move along the electric linear of force?

Calculate the work done by a force F = 3x2ˆi + (xz − y)ˆj + 2z kˆ
r
in moving a particle
along the curve x = 2t2; y = t; z = 4t2 − t from t = 0 to t = 1. Is the force conservative?

what is induction

You have 2 metal spheres and want to charge them both with exactly equal amounts of a positive charge. You have only a negatively charged insulator, insulating gloves, and an insulating table to work with. You may use yourself as a ground if needed. Describe a method to charge the spheres.

An electric guitar functions via induction. As the steel strings vibrate a pickup coil of wire has an emf induced due to changing magnetic fields generated by the string. The perpendicular component of the field above the pickup coil is given by: B= 50mT+ 3.2mT·sin(2π 523 t/s) and is uniform at any given time over the area of the pickup coil. If the pickup coil has a radius of 2.7 mm and consists of 30 turns what is the induced emf in the pickup coil a function of time?

To monitor the breathing of a patient in the hospital, a thin belt is wrapped around the patients chest. The belt is a composed of 200 turns. When the patient inhales, the area of the coil increases by 39 square centimeters. The magnitude of Earth's magnetic field is 50.0 μT and makes a 28 degree angle with the plane of the coil. If a patient takes 1.80 s to inhale, calculate the induced EMF generated in the coil during this time.

4. I. Which of the following mixtures are miscible liquids?
a. Pentane and acetic acid
b. Oil and water
c. 1,1,1,1-tetrachloromethane and ethanol
d. Methanol and ethylamine

II. Liquid-liquid miscible mixtures can be separated through
a. chromatography
b. fractional distillation
c. filtration
d. both a and b

III. In fractional distillation, a large surface area for condensation is provided through
a. a thermometer
b. water bath
c. a fractionating column
d. reflux condenser

3. A. Briefly explain the use of each of four major classes of organic compounds that are very important in living organisms.
B. List any 2 compounds of ketones and esters and their uses.

A body is given +1C charge. How many electrons added or removed from the body?

3. In a situation like that shown below, the charged particle is a proton
(q = 1.60 x 10-19 C, m = 1.67 x 10-27 kg) and the uniform, 0.500-T magnetic field is directed along the x-axis. At t =0 the proton has velocity components vx = 1.5 x 105 m/s, vy = 0 and vz = 2.00 x 105 m/s. Only the magnetic force acts on the proton. (a) At t =0, find the force on the proton and its acceleration. (b) Find the radius of the resulting helical path, the angular speed of the proton, and the pitch of the helix (the distance traveled along the helix axis per revolution).