This is about the classic LED flasher ckt using 2 transistors (refer to the ckt in attached file). why the positive side of the capacitor is connected to the collector and the negative side is connected to the 100k registor ? plaese help , I am new to electronics.

 

Collector is positive compared the 100K R
and polarized caps should not be connected in reverse

 

The 100k R is connected to +9v. how the collector can be more positive?

 

compared to the collector load (resistance) it is negative

 

The current gain for the 2N3904 is around 50 to 100 at 10 mA. Assume 10 mA though the LED (it really doesn't matter). The voltage drop across the 470 ohm will be 4.7 volts. Base current at gain of 50 will be 0.2 mA. Voltage drop across the 100K will "20V." Of course, that is not possible, but you should see that if the current gain is less than the ratio of 100K to 470 (approx. 212), then the voltage drop across the 100K will be higher making the polarity correct as shown.

John