Recent content by Jonnyto

Homework Statement Figure 29 shows a battery connected across a uniform resistor R0. A sliding contact can move across the resistor from x=0 at the left to x=10 cm at the right. Find an expression for the power dissipated in the resistor R as a function of x. Plot the function for ℰ=50 V...

Okay how would I solve it using power? Do I set up the power as a differential dw/dt? However an issue is that i(the current is not isolated) and it is mixed within all the other values. I can only isolate either the varying resistance or the current or at least I think so.

Homework Statement In the circuit of Fig. 23, ℰ, R1, and R2 have constant values but R can be varied. Find an expression for R that results in the maximum heating in that resistor. Homework Equations V=IR resistors in parallel add up in inverse, resistors in series add up directly...

Hmm that's what I'm unsure of now. Was this energy lost pushing the charge to the other capacitor?

1/4 the original energy on each.

Would that cut the electric field in half?

Homework Statement One capacitor is charged until its stored energy is 4.0 J, the charging battery then being removed. A second uncharged capacitor is then connected to it in parallel. (a) If the charge distributes equally, what is now the total energy stored in the electric fields?(b) Where...

Ahh! Thank you so much! I had no idea about the linear expansion.

Yes I have.

Okay I have attached the diagrams. How would I go about differentiating with respect to Capacitance and Temperature.

Homework Statement A capacitor is to be designed to operate, with constant capacitance, in an environment of fluctuating temperature. As shown in Fig. 23, the capacitor is a parallel-plate type with plastic "spacers" to keep the plates aligned. (a) Show that the rate of change of capacitance C...

Okay well my issue is from a basic problem. The problem is you are given an unlimited number of 10 Ohm resistors. They can only handle 1 watt of dissipation and you need to create a circuit that has a total resistance of 10 Ohms, and has a power dissipation of 5 Watts. They are actually looking...