1. The problem statement, all variables and given/known data There are 2 nichrome wires P and Q are connected in series to battery of emf , V . Both P and Q are of same length bu the diameter of wire P is bigger than that of wire Q . When wire P and Q glow steadily , which one would glow brighter ? 2. Relevant equations 3. The attempt at a solution What determines the brightness of the nichome wire ? Is it the temperature(as in when its hotter it glows more) ? Then how is different when the nichrome wires are connected in parallel ?