Recent content by tomrja

Homework Statement Two slits are illuminated with 483 nm light. If the slits are separated by 0.84 mm and each have a width of 0.07 mm, about how many bright interference fringes will be seen in the region of the central diffraction maximum? Homework Equations 2nd = (m + 1/2)\lambda...

Homework Statement A metal sphere of radius a is surrounded by a metal shell of inner radius b and outer radius R, as shown in the diagram below. The flux through a spherical Gaussian surface located between a and b is 1.20Q/εo and the flux through a spherical Gaussian surface just outside R...

Homework Statement Consider a series LCR circuit with R= 69.0 Ω and L= 0.100 H, driven by a sinusoidal emf with Erms= 6.70 V at frequency f= 250 Hz. The sinusoidal current leads the emf by 54.0 degrees. a) Calculate the capacitance C. b) What is the rms current in the circuit? c) If...

I read up a little bit on this subject and found that at resonance xL=xC, IxL=Ixc, therefore VL=Vc. Thank you for your suggestions.

Homework Statement The voltages across two circuit elements in series is zero. Is it possible that the voltages across the individual elements are nevertheless not zero? Give an example. Homework Equations NA The Attempt at a Solution I am not really sure where to start with this problem...

Homework Statement When a particular inductor and capacitor are connected across the same AC voltage, the current in the inductor is higher than in the capacitor. Is this true for all frequencies? Homework Equations Current through a capacitor Ip=(Vp)(2pi)(f)(C) Current through an inductor...

Ahhh duh, guess I should have read the problem again haha. Thanks!

Homework Statement A copper rod of mass 0.6 kg rests on two rails 1.3 m apart and carries a current of 31 A from one rail to the other. The coefficient of static friction is 0.3. What is the magnitude of the least magnetic field that would cause the bar to slide? Homework Equations F=...

I got it... I went way more into this problem than I should have. It just ended up being T=RC. Thanks for you help Take Care

haha... ok. I'm sorry, I'm still lost... I'll show you what I have done and maybe you can guide me from there. I found a equivalent capacitance and that was 6.3462e-6F. I know that Q=CV=(6.3462e-6F)(11)=6.98077e-5 which is the max charge on the capacitor. I know that I=V/R=(11V)/(4ohm)=2.75A...

Ahh okay. But how am I supposed to know what I and Io are?

I got an equivalent capacitance of 6.3462e-6F. I guess I am not understanding where the currents in the equation come into play. Would I use Q=CV? Where would that get me? Also, I found an equation for the circuit to be V-(R1*I)-(Q/C)=0. What is the difference between I and Io? Isn't there only...

The part about how the higher resistance of the voltmeter makes sense because the inverse property of adding resistors in parallel. Here are the numbers that I worked out. Maybe you can tell me where I went wrong. I first found the equivalent resistance of the voltmeter and both resistors...

Homework Statement The output of the voltage-divider network shown in the diagram below is to be measured with two different voltmeters, V1 and V2. Consider the situation when V0 = 32.4 V, R1 = 205 Ω, and R2 = 465 Ω. a) When the voltmeter V1, whose internal resistance is 4.80 k Ω is placed...

Homework Statement Two capacitors (c1 = 11 and c2 = 15 μF) are charged in series by a 11 V battery. Find the time constant of the charging circuit. (r = 4 Ω). Homework Equations V=E(1-e^(-t/T)) Where T=Tau=RC, E is the Voltage of the power source, and V is the voltage of the capacitor...