Physics

Problem

A solenoid

20\,\text{cm}

long has

400

turns and carries a current of

2\,\text{A}

. A single circular coil of radius

4\,\text{cm}

also carries the same current of

2\,\text{A}

. Assume

\mu_0 = 4\pi \times 10^{-7}\,\text{T\,m\,A}^{-1}

. a. (i) Calculate the magnetic field inside the solenoid. b. (ii) Calculate the magnetic field at the centre of the circular coil. c. (iii) Which of the two magnetic fields obtained above is stronger?

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