A solenoid that has length 30 cm, radius 1.2 cm, and 300 turns carries a current of 2.6 A. Find the magnitude of the magnetic field on the axis of the solenoid:

Explanation:

length, l = 30 cm

Number of turns, N = 300

Current, i = 2.6 A

number of turns per unit length, n = N / l = 300 / 0.3 = 1000

The magnetic field due to the current carrying solenoid is

B = 4 x 3.14 x 10^-7 x 1000 x 2.6

B = 3.27 x 10^-3 T

B = 3.27 mT

In a chemical formula, the elements in a compound are represented by their chemical symbols, and the ratio of different elements is represented by subscripts. Consider the compound water as an example. Each water molecule contains two hydrogen atoms and one oxygen atom.

Explanation: