CBSE Class 12-science Answered
How resistors reduce the current?
Asked by Vasavi GS | 14 Feb, 2014, 12:57: PM
Expert Answer
The current in the wire flows due to the drift of electrons. When the ends of wire are connected to a cell, the electrons start moving from negative terminal to the positive terminal.
A resistor is like a wall to the flow of electrons. The electrons collide with the large number of positive ions in the wire as well as the resistor and due to this, their speed decreases. Thus, the resistor offers resistance to the flow of electrons because of these collisions.
Answered by | 14 Feb, 2014, 01:10: PM
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