Calculating Magnetic Fields – Practice Questions:1) What is the strength of a magnetic field at a distance of 2cm from a wire carrying a current of 5A?2) What current would a student need to run through a wire to achieve a magnetic field of 1.0 × 10^{−}^{5} T at a distance of 5cm from the wire?3) What is the strength of a magnetic field in a 10cm solenoid that has 1000 turns carrying a current of 5A?4) How many turns are there in a solenoid that is 10cm long and achieves a magnetic field of 0.005 T with a current of 1 amp? Quick Answers:1) 5 × 10^{−5} T2) 2.5 A3) 0.06285 T4) 3977.7 Worked Answers: