Calculating Magnetic Fields – Practice
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?
1) 5 × 10−5 T
2) 2.5 A
3) 0.06285 T