Two long, parallel, current-carrying wires lie in an xy-plane. The first wire lies on the line y = 0.320 m and carries a current of 30.0 A in the +x direction. The second wire lies along the x-axis. The wires exert attractive forces on each other, and the force per unit length on each wire is 290 µN/m. What is the y-value (in m) of the line in the xy-plane where the total magnetic field is zero?
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Ответ:
y = 0.108m
Explanation:
The magnitude of the magnetic force is given by:
and the force per unit length is:
you first calculate I2 from (2):
With this values of I2 you can the position in which the magnitude of the magnetic field is zero, by using (1) for both wires:
hence, for y=0.108m the magnitude of B is zero
Ответ:
Explanation:
From the question we are told that:
Frequency![F=330Hz](/tpl/images/1387/8379/af63f.png)
Sound intensity drop![I_d=2](/tpl/images/1387/8379/436a3.png)
Time![T=4s](/tpl/images/1387/8379/7f30f.png)
Therefore
Sound intensity Ratio
Generally the equation for Sound intensity is mathematically given by
Generally the equation for Quality Factor is mathematically given by