Recent content by kjlchem

Yeah, I used ε = -dflux/dt. The flux as a function of time = μ(dI)(L)W/(2∏rdt)

Homework Statement An infinite straight wire carries a current I that varies with time as shown above. It increases from 0 at t = 0 to a maximum value I1 = 2.1 A at t = t1 = 14 s, remains constant at this value until t = t2 when it decreases linearly to a value I4 = -2.1 A at t = t4 = 24 s...

Homework Statement A proton (q = 1.6 X 10-19 C, m = 1.67 X 10-27 kg) moving with constant velocity enters a region containing a constant magnetic field that is directed along the z-axis at (x.,y) = (0,0) as shown. The magnetic field extends for a distance D = 0.7 m in the x-direction. The...

Cool! I did not know that. Thank you!

The voltage on the capacitor before the switch is closed is 0, I believe . After it is = To the v at the battery

Forgot to attach the diagram!

Homework Statement A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 49 Ω, R3 = 64 Ω and R4 = 64 Ω. The capacitance is C = 88 μF and the battery voltage is V = 24 V. The switch has been open for a...

Never mind! Got it! The problem also asks for the potential difference between V(a) and V(b). Is this just V=IR where R= R6 and I=I2?

Homework Statement A circuit is constructed with five resistors and one real battery as shown above right. We model. The real battery as an ideal emf V = 12 V in series with an internal resistance r as shown above left. The values for the resistors are: R1 = R3 = 30 Ω, R4 = R5 = 78 Ω and R2...

Okay, I got that part. Now, to find I3, can I use my equations and Kirchoff's laws?

If you click on it, I think it gets bigger.

Homework Statement A circuit is constructed with six resistors and two batteries as shown. The battery voltages are V1 = 18 V and V2 = 12 V. The positive terminals are indicated with a + sign, The values for the resistors are: R1 = R5 = 56 Ω, R2 = R6 = 157 Ω R3 = 118 Ω, and R4 = 97 Ω. The...

Voltage adds in series, and current is the same. Does this mean that V1 + V3 = V2 + Vx? I could be totally off, but from there I get R1V1 + R3I3 = R2I2 +RxIx. That doesn't really seem to help me. If R1 and R3 are in series, then I3=I1 and I2=Ix. It still seems like I have a lot of equations...

Okay, I get that. So, V2=V1 and R1I1=R2I2, but I don't know what I2 is. Do I have to calculate Req to get Ieq?

Homework Statement A circuit is constructed with five resistors and a battery as shown. The battery voltage is V = 12 V. The values for the resistors are: R1 = 75 Ω, R2 = 127 Ω, R3 = 129 Ω, and R4 = 130 Ω. The value for RX is unknown, but it is known that I4, the current that flows through...