(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two bulbs P and Q labelled 12V , 24 W and 12 V and 36 W respectively are connected in series with a battery 24 V . Among the following statements , which one describes correctly about bulb P and Q

(a) potential difference across P > pd across Q

(b) resistance of Q > resistacne of P

(c) current passing through Q > current in P

(d) power dissipated from Q > power dissipated from P

(e) potential difference and current in both bulbs are the same

3. The attempt at a solution

For (a) , i don think its right , since from P=VI , where I is constant here , when P increases ,V also increases .

For (b) , i think its correct because from P=I^2 R , when P increases , R also increases .

(c) its not correct since the current passing through both bulbs are the same

(d) this is also correct , since given that Q is 36 W and P is 24 W

(e) this is incorrect .

Is my reasoning for each correct ?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Physics power question frustrating me

**Physics Forums | Science Articles, Homework Help, Discussion**