- #1

Max T

- 2

- 0

## Homework Statement

What is the

**voltage**of the

**bulb D**? Given the total voltage supplied by the cells is 4 watts and each bulb is identical and has a resistance of 3 ohms

## Homework Equations

V=IR

## The Attempt at a Solution

By assuming bulb A,B, and C as a group , their effective resistance would be 2 ohms.

Thus, the effective resistance of the circuit is

__Effective resistance of bulb A,B,C + resistance of Bulb D = 5 ohms__

Hence, the current across the circuit is

__. Therefore, the voltage of bulb D is__

__total voltage supplied__/__effective resistance of the whole circuit__= 4/5 A__4/5A x 3 ohms = 12/5 W__

*forgive me for my random attempt , since my teacher never taught me anything about this part