Field Theory Answers

What is the electric flux through the disk of radius r = 0.1m if the uniform electric field has

a magnitude E = 2x103 N/C? What is the flux when the disk is perpendicular to the E? What is the flux when the disk is parallel to the E?

In the following figure, a rod of Length L=8cm has negative charge q = -4fC uniformly

distributed along its length. a) What is the linear charge density of the rod? b) What are the

magnitude and direction of the electric field produced at point P, at a distance d = 10cm from the rod?

A point charge Q1 = 10C is at the origin, and a second charge Q2 = -5C is placed on the y￾axis at y = 1m. What is the total electric field at the point P with coordinates x=2m, y=1m?

A proton and an electron form two corners of an equilateral triangle with sides of length 3

µm. What is the magnitude of their net electric field at the third corner?

A charge of +3µC is distributed along a rod which on the x-axis extending from x=1m to

4m. a) What is the linear charge density of the rod? b) Find the electric field at the origin due to the charged rod.

Two charges are placed on the x-axis. A charge q1= 6µC is placed at x=3cm and charge

q2=-12µC charge is placed at x=5cm. a) Determine the magnitude and direction of the force

on the q1. b) Determine the magnitude and direction of the electric field at the origin.

During a cricket match a cricket ball is hit with an initial velocity of 45.0 m s^-1 at an angle of 30.0^o to the horizontal from a height of 1.10 m above the ground. It lands in the spectators' balcony which is 8.50 m above the ground. 

Calculate the horizontal and vertical components of the cricket ball’s initial velocity.

If two block with masses 5kg and4kg connected by a string are placed on a horizontal table and are pulled by a force of 30N calculate the tension in the string if frictional force is negligible.Repeat the problem if the coefficient of kinetic friction between the blocks an the table is 0.3N

A vehicle of mass 550 kg moves at a speed of 16.5 m.s⁻¹ on a circular path of radius 71.0 m. Calculate the magnitude of the centripetal force required to keep the vehicle on this trajectory in N and round to the nearest whole number of Newtons.

A wave represented by y= (3.00m) sin (2.5t-3.14x). Find the (a) amplitude, (b) angular frequency, (c) frequency, (d) wave number, (e) wavelength, and (f) speed of the wave