railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Devices Optical Devices Light Emitting Diode (LED)
An LED has a rating of 2 V and 10 mA. If it is connected to a 6V battery, the minimum value of series resistance is
1
40 Ω
2
100 Ω
3
200 Ω
4
400 Ω