Current Electricity Charging Discharging Of Capacitors Question 446
Question: Three equal resistors connected in series across a source of e.m.f. together dissipate 10 watt. If the same resistors are connected in parallel across the same e.m.f., then the power dissipated will be
[CBSE PMT 1998; KCET (Engg.) 1999; MP PMT 2003]
Options:
A) 10 watt
B) 30 watt
C) 10/3 watt
D) 90 watt
Show Answer
Answer:
Correct Answer: D
Solution:
In series $ P _{S}=\frac{P}{n} $
Therefore $ 10=\frac{P}{3} $
Therefore $ P=30,W $ In parallel $ P _{P}=nP $ = 3 ´ 30 = 90 W
BETA
