logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Communication Systems
0 votes

An amplitude modulated wave has 800watt of total power content.For 100% modulation the carrier should have power content equal to

$\begin{array}{1 1}(a)\;\text{1000 W}\\(b)\; \text{2000 W}\\(c)\;\text{1500 W}\\(d)\;\text{1600 W}\end{array}$

Can you answer this question?
 
 

1 Answer

0 votes
Power of transmitted AM wave $P_t=xW$
Power of carrier wave $P_c$ after modulation =800W
Modulation $m=100\%$
$P_t=P_c(1+\large\frac{m^2}{2})$
$x=800(1+\large\frac{1}{2})$
$x=\large\frac{800\times 3}{2}$
$x=1200$
Total power of carrier wave=$1200+800$
$\Rightarrow 2000W$
Hence (b) is the correct answer.
answered Mar 17, 2014 by sreemathi.v
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...