Effect of resistor

Lets see how resistor affect the circuit.

Things needed:

• Resistor- 470Ω,1kΩ,2.2kΩ.
• LED
• 9V battery
• Bread board
• Wires

Setup the circuit as shown below:

The circuit is setup in the breadboard as shown below:

Note the intensity with which LED glows. Replace the 2.2kΩ with 1kΩ. You will notice that LED glows brighter compared to the previous configuration! Replace the 1kΩ resistor with 470Ω resistor. LED glows brightest of the previous configurations.

This shows that, as the resistance of the circuit decreases, the current in the circuit increases! That implies that resistor acts as a hindrance to the flow of current through it.

Please feel free to ask doubts by ‘comments’.