EXP-1

>> Resistance is bidirectional.

>>Agr Hume 220 measure krna hai jasise to hm 200 waale nhi uske next p knobe ko set krnge. 

>> left down circle is resistance measurement

>> measuring ac voltage. in this polarity don't matter

>> measuring dc voltage. in this polarity matters.

>> measuring resistance

>>right up is AC voltage and below it is DC current.

>> com m hmesha black wire lgegi .aur hme jab voltage nikalni hogi to red waali ko left p lgaenge and jb current nikalna hoga to right waali p .and transistor hmesha NPN and PNP k phle 3 blocks m lgega.

>> measuring resistance, current and voltage

>> we can't connect the LED directly to the battery or it will blast so we add resistance to it.

>> cathode(short terminal) of led is connected to black or -ve terminal of the battery.