Why is there no voltage drop through this resistor?

[trickybilly]

I have wired in series: + of 9V battery --- + of 1000 uF capacitor --- 660 Ohm resistor --- + of a green LED --- - of the 9V battery. Remark: the 9V battery is a bit depleted 7.8 V unconnected.

Voltage drop across the capactor is 6.5V, across the LED is 1.5V but 0V across the resistor. Why there is no voltage drop across the resistor?

 

[rbelli1]

Try this:
1) discharge the capacitor by placing the resistor across it for several seconds.
2) connect everything back up except the LED to - of the battery
3) connect the - of the battery while carefully watching the LED.

What did you see?

4) now remove the capacitor

What do you see now?

BoB

 

[phinds]

I have wired in series: + of 9V battery --- + of 1000 uF capacitor --- 660 Ohm resistor --- + of a green LED --- - of the 9V battery. Remark: the 9V battery is a bit depleted 7.8 V unconnected.

Voltage drop across the capactor is 6.5V, across the LED is 1.5V but 0V across the resistor. Why there is no voltage drop across the resistor?

Do you understand how capacitors work?

EDIT: Let me rephrase that: you clearly don't yet understand how capacitors work, so that's where you should focus. Study capacitors for a bit and you will understand what is happening in your circuit. That's where rbelli1 is leading you.

 

[trickybilly]

@phinds I have received my answer. Do YOU understand it?

 

[jim hardy]

Do YOU understand it?

You'll bite a helping hand ? Thanks for the warning.

 

[Dale]

Since the OP has been answered we will close this thread. Everyone, please remember to be polite in future threads.