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 × 105 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 T

2) 2.5 A

3) 0.06285  T

4) 3977.7 

Worked Answers:

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