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An ideal parallel-plate capacitor consists of a set of two parallel plates of area A separated by a very small distance d. When this capacitor is connected to a battery that maintains a constant potential difference between the plates, the energy stored in the capacitor is U0. If the separation between the plates is doubled, how much energy is stored in the capacitor?

A charge of 2.00 μC flows onto the plates of a capacitor when it is connected to a 12.0-V potential source. What is the minimum amount of work that must be done in charging this capacitor?

An electron is initially moving to the right when it enters a uniform electric field directed upwards. Which trajectory shown below will the electron follow?

Electric field of multiple point-charges: Three equal negative point charges are placed at three of the corners of a square of side d as shown in the figure. Which of the arrows represents the direction of the net electric field at the center of the square?

Each plate of a parallel-plate air-filled capacitor has an area of 0.0020 m2, and the separation of the plates is An electric field of is present between the plates. What is the surface charge density on the plates? (ε0 = 8.85 × 10-12 C2/N • m2)

Unlike for 1st order filters,  pass-band gain K, quality factor Q, and cutoff frequency can be independantly adjusted for 2nd order active LPFs and HPFs that were used in lab.

Give the Quality Factor (Q) of this second-order filter. Round your answer to the nearest 0.1.   

The following schematic shows an active first-order high pass filter.   

You are evaluating a project for The Farstroke golf club, guaranteed to correct that nasty slice. You estimate the sales price of The Farstroke to be $430 per unit and sales volume to be 1,000 units in year 1; 1,500 units in year 2; and 1,325 units in year 3. The project has a 3-year life. Variable costs amount to $240 per unit and fixed costs are $100,000 per year. The project requires an initial investment of $174,000 in assets, which can be depreciated using bonus depreciation. The actual market value of these assets at the end of year 3 is expected to be $38,000. NWC requirements at the beginning of each year will be approximately 20 percent of the projected sales during the coming year. The tax rate is 21 percent and the required return on the project is 10 percent. What change in NWC occurs at the end of year 1?

If you use your scope to view the FFT of the output signal of the circuit shown, how many peaks would you observe?