EGR203 Assignment 3 (a)
- Suppose we have two Aluminum foil sheets (250 mm by 250 mm
square) with a 12-µm thick food wrap dielectric (estimated relative
dielectric constant of 2.5). Calculate the capacitance.
- Given two capacitors, one of 15 µF and the other 30
µF. Find the effective capacitance if the capacitors are
connected in series (end-to-end) and if they are connected in parallel
(side-by-side).
- A voltage of 50 V appears across a 10-µF capacitor. Determine
the amount of charge and the energy stored on the capacitor.
- Find the equivalent capacitance between terminals x and y
in the circuit below.
where
C1 | C2 | C3
| C4 | C5 | C6
|
---|
15 μF | 10 μF | 3 μF | 12 μF | 1 μF | 5 μF
|
- Suppose the time-varying voltage across a capacitor C =
10 µF is
V = 20 sin(200t). Find the time-varying current.
- (Rizzoni 4.21) The voltage across and the current through a
capacitor are shown below. Determine the value of the capacitance.
- Suppose you have a Wheatstone bridge, shown below, with
R3 = R, the other resistances equal
to 10 kΩ and Vs = 5 V. Plot the bridge
voltage as a function of R for
5 kΩ ≤ R ≤ 20 kΩ.
- (Rizzoni 3.60) It is sometimes useful to compute a Thevenin equivalent circuit for a Wheatstone bridge.
For the circuit below,
- Find the Thevenin equivalent resistance seen by the load resistor RL.
- If VS = 12 V, R1 = R2 = R3 = 1 kΩ,
and R4 = 996 Ω is the resistance found in part b of the previous problem, use the Thevinin equivalent circuit
to compute the power dissipated by RL = 500 Ω.
- Find the power disspated by the Thevinin equivalent resistor RTh with RL
included in the circuit.
- Find the power dissipated by the bridge without the load resistor in the circuit.
- (Rizzoni 3.27) Find the current i in the circuit below.
Let VS = 5.6 V; R1 = 50 Ω;
R2 = 1.2 kΩ; R3 = 330 Ω;
R4 = 440 Ω; IS = gm V2
where gm = 0.2 S.
Maintained by John
Loomis, last updated 25 September 2014