Electricity and Magnetism Answers

  An electron is moving east at 5x106 m/s. Determine the magnetic field from a point north east with a distance of 5cm. 

  A proton is moving east at 4x106 m/s. Calculate the strength of the magnetic field at a distance of 1cm north. 

1.   A current of 30A flows north on a 5m long wire and a current of 50A flows south on a 5m long wire. The two wires are 3cm apart. Calculate the magnitude of the magnetic force between the two wires. 

What will happen to the dipole when it place inside the

uniform Electric Field

NOTE:. Your Assignment should cover following points

• What is a dipole

• what is force acting on dipole

• what is torque on dipole

• expression for potential energy of d

ipole

Consider that earth is a positively charge object having charge equals to its mass (6×1024C)

and the moon is a negativity charge particle of charge (7×1022C)

a) Find the coulomb force between them if the distance is 384,403 km

b) if sun, moon and earth are collinear and the distance between sun and the center of moon and

earth is 149,597,887 km find Electric Field at sun?

A soleniod 150 cm long with1550 turns has a central magnetic field of 150 mT. Find he current through the coil

1. what is the magnitude of the force on a charge of +2×10^-7 C that is 0.3 from a charge of -5×10^{-7 C?}

A proton experiences an eastward force of 30 × N while traveling in a magnetic field of 5 × T north. 

1. Find the magnitude of the proton’s velocity
2. State the direction of the proton’s velocity 
3. Draw the proton and indicate the directions of all three vectors using the appropriate notation as shown in the table above

A proton experiences an eastward force of 30 × N while traveling in a magnetic field of 5 × T north. 

1. Find the magnitude of the proton’s velocity
2. State the direction of the proton’s velocity 
3. Draw the proton and indicate the directions of all three vectors using the appropriate notation as shown in the table above

Consider the electric field 𝐸 = 𝑎𝑟

𝑟𝜌𝑙

4𝜋𝜖0

∫

𝑑𝑧

′

(𝑟

2+𝑧′

2)

3/2

+∞

−∞

due to the uniform line charge density ρl

= 12 µC/m of an infinitely long straight conducting wire at a distance r. Find out the numeric value of 

r. Remember that prime variables corresponds to the source quantity.