How does a resistor affect the current in an electrical circuit?
Take a simple example. Imagine if there is a small stream and you start putting pebbles in its path. What happens?
you block it
Yep. The stream is the current and pebbles represent the resistor.
so the resistor absorbs all the electricty?
When you put a resistor in a circuit it blocks the current and hence reduces it. Greater the resistance, lesser the current.
A resistor absorbs energy and dissipates it as heat. The regulators in fans work on this principle. There we use a variable resistor and it helps us to increase or decrease the current enabling us to control the fan speed.
Resistors provide control of current. A resistor added to a series circuit will reduce the current. A resistor added to a parallel circuit will increase the total current.|dw:1400026807056:dw|