A straight, vertical wire carries an electric current directed vertically upwards (out of the page).
Part 1: Describe the shape and direction of the magnetic field lines produced around the wire when viewed from above (looking down at the page).
Part 2: The magnetic flux density at a distance of 12 cm from the wire is 2.5 microtesla2.5\text{ microtesla}2.5 microtesla (μT\mu\text{T}μT). Which of the following is equivalent to 2.5 microtesla2.5\text{ microtesla}2.5 microtesla?
2.5×10−3 T2.5 \times 10^{-3}\text{ T}2.5×10−3 T
2.5×10−6 T2.5 \times 10^{-6}\text{ T}2.5×10−6 T
2.5×10−9 T2.5 \times 10^{-9}\text{ T}2.5×10−9 T
2.5×10−5 T2.5 \times 10^{-5}\text{ T}2.5×10−5 T
Practise AQA GCSE Physics Permanent and induced magnetism, magnetic forces and fields with exam-style questions for Foundation and Higher tier. 12 questions covering Poles of a magnet and Magnetic fields, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.