(Continued)

ERB = RB x It

= 125 x 2 a

ERB = 250 v

Therefore,

ER3 = 250 v

ER4 = 250 v

When the voltage across a resistor is known, the

current through the resistor is determined by

using Ohm's law. The voltage across R4 was

calculated to be 250 v. To compute the current

through R4, insert the two known values into the

equation for Ohm's law.

IR4 = ER4

R4

= 250 V

250

IR4

1a

Note that the current through R4 is less than It.

Since current divides between R3 and R4, each

individual current must be less than It. In fact,

the sum of IR3 plus IR4 is equal to It.