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Sir hum kitne ohm ka resistor use kare woh to samajh liya lekin 0.25w and 0.5 w wali baat samajh nehi aayi. 5mm led ko 9v DC current se chalane ke liye kitne watt ki resistor use karna chahiye?
agar board ka connection ulta hua toh switch off karne par bhi current aayega yeh toh bataya nahi tumne pahle safety ke liye batao sab expert nahi hote