waltssillyhat
Member
- Joined
- Mar 1, 2025
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- HSC
- 2026
"A 30 cm long solenoid with a 2 cm diameter is to produce a 0.2 T magnetic field in its centre. If the maximum current is 8 A, how many turns must the solenoid have? (Assume that each coil is circular rather than helical.)"
I know that I have to use the formula B = (μNI)/L, but I don't understand where to use the given of the diameter. Do I use it to determine how much current the solenoid can handle? If so, how would I approach doing this?
I know that I have to use the formula B = (μNI)/L, but I don't understand where to use the given of the diameter. Do I use it to determine how much current the solenoid can handle? If so, how would I approach doing this?