Current Electricity Charging Discharging Of Capacitors Question 94
Question: A 500 W heating unit is designed to operate from a 115 volt line. If the line voltage drops to 110 volt, the percentage drop in heat output will be
[ISM Dhanbad 1994]
Options:
A) 10.20%
B) 8.1%
C) 8.6%
D) 7.6%
Show Answer
Answer:
Correct Answer: C
Solution:
$ P _{consumed}={{( \frac{V _{A}}{V _{R}} )}^{2}}\times P _{R}={{( \frac{110}{115} )}^{2}}\times 500=457.46W $ So, percentage drop in power output $ =\frac{(500-457.46)}{500}\times 100=8.6% $
BETA
