Current Electricity Charging Discharging Of Capacitors Question 496
Question: Two conductors made of the same material are connected across a common potential difference. Conductor A has twice the diameter and twice the length of conductor B. The power delivered to the two conductors $ P _{A} $ and $ P _{B} $ respectively is such that $ P _{A}/P _{B} $ equals to
Options:
A) 0.5
B) 1.0
C) 1.5
D) 2.0
Show Answer
Answer:
Correct Answer: D
Solution:
$ R=\rho \frac{l}{A} $ and $ P\propto \frac{1}{R} $
Therefore $ P\propto \frac{A}{l} $
Therefore $ P\propto \frac{d^{2}}{l} $
Therefore $ P _{A}=2P _{B} $
BETA
