(b) With a current of 0.38 A, the average velocity of an electron in the wire is 5.5  10-6 m s-1 and the average magnetic force on one electron is 1.4  10-25 N. Calculate the flux density B of the magnetic field.

B = 0.159 T

Explanation:

Given that,

Current, I = 0.38 A

The average velocity of the electron,

The average magnetic force on the electron,

We need to find the flux density B of the magnetic field. We know that the magnetic force is given by :

Put all the values,

So, the required flux density of the magnetic field is 0.159 T.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas