A solenoid that is 68.7 cm long has a cross-sectional area of 15.1 cm². There are 907 turns of wire carrying a current of 7.89 A. (a) Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field there (neglect end effects). (a) Number (b) Number Units Units
A solenoid that is 68.7 cm long has a cross-sectional area of 15.1 cm². There are 907 turns of wire carrying a current of 7.89 A. (a) Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field there (neglect end effects). (a) Number (b) Number Units Units
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Transcribed Image Text:A solenoid that is 68.7 cm long has a cross-sectional area of 15.1 cm². There are 907 turns of wire carrying a current of 7.89 A. (a)
Calculate the energy density of the magnetic field inside the solenoid. (b) Find the total energy in joules stored in the magnetic field
there (neglect end effects).
(a) Number
(b) Number
Units
Units
Transcribed Image Text:A 12 H inductor carries a current of 2.4 A. At what rate must the current be changed to produce a 85 V emf in the inductor?
Number
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