Answer:
Explanation:
We are given that
Diameter of wire=d=4.12 mm
Radius of wire=r
Current=I=8 A
Drift velocity=
We have to find the density of free electrons in the metal
We know that
Density of electron=
Using the formula
Density of free electrons=
By using Area of wire=
Density of free electrons=
Answer:
The magnetic field is upwards.
Explanation:
You have to use "Right-hand rule", but for electrons, the direction of the magnetic force should be reversed.
Answer:
2500 N/C
Explanation:
Electric Field: This can be defined as the the force per unit charge in an electric field. The S.I unit is N/C
V = E.r ....................... Equation 1
Where V = Electric potential, E = Electric Field, r = Distance between the two parallel plate,
Make E the subject of the equation,
E = V/r .................... Equation 2
Given: V = 10 V, r = 4.00 mm = (4/1000) m = 0.004 m.
Substitute into equation 2
E = 10/0.004
E = 2500 N/C
Hence the electric field = 2500 N/C
