If the voltage drop across the power supply is 100 Volts and

If the voltage drop across the power supply is 100 Volts, and three identical resistors are connected in series, what is the voltage drop about a single resistor?

Solution

Ans) As three identical resistors are connected in series

using Voltage division or V=I*R(ohm\'s law)

Voltage across each Resistor is =100*R/(R+R+R)=100/3=33.33 V

Voltage across each Resistor is=33.33 V

where I=100/(R+R+R) and V=I*R you get above formula