Electricity and Magnetism Answers

Find the distance of an isolated positive point charge of 10 nC, in order for it to produce

an electric potential of 120 V.

A particle charge 4 x 10 ^-9 C is located at a point (0,0) in a certain coordinate system. Assuming all lengths are in meters, calculate the potential of the following points: A (3,3) and B (0,2). How much work is needed to take a particle of charge 2 x 10^-5 C from A to B?

A flat surface of area 1.25 m2 is rotated through a uniform horizontal electric field of 5 N/C. What is the electric flux if the surface is (a) parallel and (b) perpendicular to the electric field?

A flat surface of area 1.25 m2 is rotated through a uniform horizontal electric field of 5 N/C. What is the electric flux if the surface is (a) parallel and (b) perpendicular to the electric field?

A point particle of charge 2.5 x 10^9 C and a mass of 3.65 x 10^-7 kg in uniform electric field directed to the right. It is released from rest and moves to the right. It is released from rest and moves to the right. After it has traveled 1.45 m, its speed is 35 m/s. Find,

a) work done on the particle

b) change in the electric potential energy of the particle

An isotope ²⁴Mg moves through a velocity selector of a mass spectrometer has an electric field of 150 Vcm^-1 and a magnetic field of 0.70 T. Calculate the velocity of the isotope that exits the velocity selector.

A plane of two turns coil of area 0.0127 m² is placed in a uniform magnetic field of 0.7 T. The current in the coils is 3 A. If the plane makes an angle of 50° with the magnetic field, calculate the torque exerted on the coil.

An electron moves in a uniform magnetic field. At a particular instant the speed of the

electron is 3.0x10^(6) m/s and the magnitude of the magnetic force acting on it is

5.0x10^(-13) N. The velocity of the electron makes an angle of 30^o with the direction of

the magnetic field. Calculate the magnetic field strength at that instant.

How is an electric field produced by an object with an electric charge?

How do charged bodies interact with other charged bodies?