3 years ago

A postman needs to deliver a parcel to Peter's house 5

Physics

1 answer:

Phantasy [73]3 years ago

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Answer: 5

Explanation:

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The quantity of charge Q in coulombs (C) that has passed through a point in a wire up to time t (measured in seconds) is given by :

$Q=t^3-2t^2+4t+4$

We need to find the current flowing. We know that the rate of change of electric charge is called electric current. It is given by :

$I=\dfrac{dQ}{dt}\\\\I=\dfrac{d(t^3-2t^2+4t+4)}{dt}\\\\I=3t^2-4t+4$

At t = 1 s,

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So, the current at t = 1 s is 3 A.

For lowest current,

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