Electricity and Magnetism Answers

An Electron enters perpendicularly into a uniform magnetic field which has a flux density of 0.12T. This results in a magnetic force of 9.6x10-12N on the electron. Calculate the speed of the electron as it enters the magnetic field. [ e=1.6x10-19 C]

A long straight wire carries a current 1.5A. an electron travels with a speed of 5*10^6cm/sec parallel to the wire 10cm from it and in the same direction as the current. What force does the magnetic field of the current exert on the moving electron

Two long parallel wires are 10cm apart and carry currents of 6A and 4 A. What is the field at B at 4A carrying wire due to 6A wire

Only certain materials can be magnets. What does it depend on?

A current 5A passes through a straight wire in a uniform magnitude field of a flux density of 2.0x10-3 T. Calculate the force per unit length exerted on the wire when it is inclined at 30° to the field.

Magnetic field and Ampere’s law assignment
Two long parallel wires are 10 cm apart and carry currents of 6 A and 4 A. what is the field B at 4 A carrying wire due to 6 A wire.
A long straight wire carries a current of 1.5 A. an electron travels with a speed of 5 x 106 cm/s parallel to the wire 10 cm from it and in the same direction as the current. What force does the magnetic field of the current exert on the moving electron.

Calculate the momentum of a particle knowing that its wavelength is 10.13 x 10^-5 m.

An ion engine has 1 tasla magnetic field and a hydrogen plasma is to be short out at E×B velocity of 1150km/s. How much internal electric field must be present in plasma

The electric field produced by, a disk of radius R that carries uniformly distributed positive charge q, at a point P located on the axis of the disk (which we choose as the positive z- axis) a distance z from its center is given by equation;

E_z= 1/(4πε_0 ) 2qz/R^2 (1- z/√(z^2+R^2 ))
Starting with above equation write an equation in vector form that gives the electric field when point P is located either on the positive or negative axis of the disk of charge.

A 2f capacitor is charged to a potential difference of 200v, then the supply is disconnected. The capacitor is then connected to another uncharged capacitor. The potential difference across the parallel arrangement is 80v. Find the capacitance of the second capacitor.