2 years ago

Please help! I put this under physics since their was no science button:

Physics

2 answers:

Digiron [165]2 years ago

7 0

Four letter a the answer is disk b what the other person said I cant answer the B

Andreyy892 years ago

5 0

Disk a and I unfortunately am not able to help with the second question

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(a) Energy density will be equal to $57.31J/m^3$

(b) Total energy will be equal to 0.0718 J

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It is given that length of solenoid l = 78.8 cm = 0.788 m

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Number of turns of the wire N = 914

Current in the solenoid i = 8.25 A

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(b) Total energy stored in magnetic field $U=\frac{1}{2}Li^2=\frac{1}{2}\times 2.11\times 10^{-3}\times 8.25^2=0.0718J$

(a) Energy density will be equal to

$U_b=\frac{0.0718}{15.9\times 10^{-4}\times 0.788}=57.31J/m^3$

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