A current of 2 A flows through a conductor for 4 s. What amount of charge passes through the conductor ?

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Q: The sound waves travel with speed of 456 m/s. If is wavelength is 8 m. Find the frequency of wave ?

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.