Electricity and Magnetism Answers

Make a concept map that relates electric potential with work, potential and electric field.

An amoeba is 0.305cm away from the 0.300cm focal length objective lens

of a microscope. (Use the thin lens formula and the magnification

formula)

A. Where is the image formed by the objective lens?

B. What is the image magnification?

C. An eyepiece with a 2.00cm focal length is placed 20.0cm from the

objective. Where is the final image?

Charges 5.0×10−7

C,−2.5×10−7

C and 1.0×10−7

C are held fixed at the three corners A,B,C of an equilateral triangle of side 5.0cm respectively. Find the electric force on the charge at C due to the rest two.

1. A solid conducting sphere of radius 40 cm has a charge of 5 µC. If the potential is zero

at infinity. Find the value of the potential at the following distances from the center of

the sphere:

a) 50 cm b) 40 cm c) 25 cm

Charges 5.0×10−7

C,−2.5×10−7

C and 1.0×10−7

C are held fixed at the three corners A,B,C of an equilateral triangle of side 50cm respectively. Find the electric force on the charge at C due to the rest two.

when a wire is moved through a magnetic field the resustsnce of the closed circuit affect

Two linearly polarized waves 4₁(2,0) = 3 cos(kz- wt) and (2,1)= 2 cos(kz-wt + 0) moving along x and y axis respectively is superposed with each other. Draw the path traced by the resultant electric vector for each polarised state for the values of 0 [0,0,0=Tabulate the values of the characteristic parameters of the curves corresponding each polarized state.

For the given vectors A = a x + a y +2a z and B = 2a x - a y + a z , A.B is

The plane of a square wire circuit with side 4.0 cm long is at an angle of 45° with respect to a uniform magnetic field of 0.25 T. The wires have a resistance per unit length of 0.2. If the field drops to zero in 2.5 s, what magnitude current is induced in the square circuit?

A point charge +Q is placed at the center of a conducting spherical shell of inner radius a and outer radius b. The total charge of the conducting shell is +2Q.

a) Find the electric field in regions I, II and III.

b) Find the inner and outer surface charge densities phi1 and phi2 of the conducting shell.