How do I calculate the field density, and mmf magneto motive force. I have the number of turns 750. The dia is 2.5 cm. The wire is #24 coated, copper magnet wire with a resistance of .025 ohms/cm/m. The voltage is 35,000v at 45 amps. the length of the solenoid is 10cm. the thickness is 50mm. the motive distance is 25mm to 9.5cm The duration of magnetic pulse is .10/sec. The core is iron 1018. how much mmf at the end of the rod and what is the field density at(adsbygoogle = window.adsbygoogle || []).push({});

25mm and what is it at 9.5 cm? Im having trouble finding B. Im great with mechanics but formula's forget it. I tried plugging the numbers into the formulas I have, but It asks for B when Im trying to find B? Thought maybe you genius' could help. Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculating field density

**Physics Forums | Science Articles, Homework Help, Discussion**