Calculate the voltage dropped by R1, given a battery voltage of 9 volts. The resistor color codes are as follows (assume 0% error on all resistor values).
R1 = Brown, Green, Red, Gold
R2 = Yellow, Violent, Org, Gold
R3 = Red, Green, Red, Gold
R4 = White, Black, Red, Gold
Printed circuit board
R1
R2
Power cable
R3
R4
9 VDC