Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Oscillations
0 votes

A taut string for which $\;\mu=5\times 10^{-2} \;Kg/m\;$ is under as tension of 80 N . How much power must be supplied to the string to generate a sinusoidal wave at a frequency of 60 Hz and an amplitude of 6 cm ?


Can you answer this question?

1 Answer

0 votes
Answer : (a) $\;512\;W$
Explanation :
Velocity (v) = $\;\sqrt{\large\frac{T}{\mu}}=\sqrt{\large\frac{80}{5 \times 10^{-2}}}=40\;m/s$
angular frequency (w) = $\;2 \pi f$
$=2 \pi \times 60=377\;s^{-1}$
Power (P) = $\;\large\frac{\mu w^2 A^2 v}{2}$
$=\large\frac{1}{2}\times (5 \times 10^{-2}) \times(377) \times (6 \times 10^{-2})^{2} \times 40 $
$=512 W$
answered Mar 8, 2014 by yamini.v

Related questions

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