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)=t3−2t2+4t+4

Find the current when t = 1s. At what time is the current lowest?

Explanation:

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 :

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 :

At t = 1 s,

Current,

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

For lowest current,

Hence, this is the required solution.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.