For 12 V lines, three consecutive LEDs and a resistor are used for lighting. The voltage drop across each LED is 3 V. What is the resistance of the resistor if a current of 50 mA flows through the circuit?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.