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mars1129 [50]
2 years ago
15

An electric current is characterized by which of the following?

Physics
1 answer:
allsm [11]2 years ago
6 0

Answer:

B. Charges that move.

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A particle moves with a velocity    1 v 5j 3j 6k ms      under influence of a contact force  F 10i 10j 20k N.    
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Answer:

P = 200 W

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The expression for the power is

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the job

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we substitute

      P = F d / t

      P = F. v

We apply this equation to our case where the velocity is

 v = (5 i + 3j + 6k) m / s

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we substitute in the power equation, remember that the scalar product of the unit vectors is

i.i = j.j = k.k = 1 and the other products are zero

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