Inductor Currents: Find L for 15kHz Oscillator & 6V RMS, 65mA Peak

  • Thread starter Thread starter dtesselstrom
  • Start date Start date
  • Tags Tags
    Currents Inductor
AI Thread Summary
The problem involves calculating the inductance L for an inductor connected to a 15 kHz oscillator with a peak current of 65 mA and an RMS voltage of 6.0 V. The relevant equations include the relationship between current, voltage, and inductive reactance (Xl). The initial calculation yielded an incorrect value of 0.979 mH due to neglecting the conversion of RMS voltage to peak voltage by multiplying by the square root of 2. After recognizing this mistake, the correct approach was clarified, leading to a resolution of the problem. Accurate calculations are essential for determining the correct inductance value in such oscillatory circuits.
dtesselstrom
Messages
29
Reaction score
0

Homework Statement


An inductor is connected to a 15 kHz oscillator. The peak current is 65 mA when the rms voltage is 6.0 V. What is the value of the inductance L? In mH


Homework Equations


Il=Vl/Xl
Xl=frequency*L

The Attempt at a Solution


Well I thought this problem was really straight forward just convert everything to similar units and plug in but I keep getting .979 mH and it says that answer is wrong so was hoping someone could help me out here.
 
Physics news on Phys.org
No need to help me on this problem I figured it out I didn't notice the rms on the voltage so I forgot to multiply by square root of 2
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...

Similar threads

Back
Top