A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of output work?

Physics

1 answer:

san4es73 [151]2 years ago

6 0

Find 10 % of 50,000 = 5000
double it to make 10000
add on to 50000 to make 60000
60000 is your answer

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A 2.4 mm -diameter copper wire carries a 37 A current (uniform across its cross section). Determine the magnetic field at the su

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Answer:

Explanation:

We shall apply Ampere's circuital law to find out magnetic field . It is given as follows.

∫B.dl = μ₀ I , B is magnetic field , I is current , μ₀ is permeability .

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magnetic field B will be circular in shape around the wire. If B is uniform

∫B.dl = B x 2πr

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Where,

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$\epsilon_0$ = Vacuum permittivity

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