Asolenoid of radius 2.0 mm contains 100 turns of wire uniformly distributed over a length of 5.0 cm. it is located in air and carries a current of 2.0 a (i) using ampere's law, calculate the magnetic field strength b inside the solenoid 4 marks] (ii) draw a diagram clearly showing the direction of current flow in the solenoid and the direction of the magnetic field.

The magnetic field strength inside the solenoid is .

Explanation:

Given that,

Radius = 2.0 mm

Length = 5.0 cm

Current = 2.0 A

Number of turns = 100

(a). We need to calculate the magnetic field strength inside the solenoid

Using formula of the magnetic field strength

Using Ampere's Law

Where, N = Number of turns

I = current

l = length

Put the value into the formula

(b). We draw the diagram

Hence, The magnetic field strength inside the solenoid is .

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips. 

C. the electric current passes from the slip rings, through the brushes, and to the collection device.