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1. If you turn on a faucet so that a thin stream of water flows from it, you may demonstrate to yourself that a charged object (such as a plastic comb) brought near it will deflect the water. The force is always attractive. Explain why this happens, in terms of the polarization of water. Draw a diagram to illustrate.
2. Suppose you have an uncharged metal sphere insulated from the ground. You also have in your possession a plastic rod that is negatively charged. Describe how you could put a positive charge on the metal sphere.
3. A negative charge of 2.0 micro coulombs is held at a distance of 0.30 m from a negative charge of 1.2 micro coulombs. Find the electrical force on the second charge due to the first charge, giving magnitude and direction.
4. An electron starts from rest in a uniform field of 30 N/C. (A) Determine its speed after a time of 1.0 microsecond. (B) Use the work-kinetic energy principle to find how far it traveled during this time.
5. Describe in your own words what capacitance is. What are its units?
6. What is the resulting capacitance of a 4.0 micro farad capacitor and a 10.0 micro farad capacitor hooked up in parallel? What is it if they are hooked in series?
Consider two identical and redundant CFR (Constant Failure Rate) components having a guaranteed life of 2 months and a failure rate of 0.15 failures per year. What is the system reliability for 10,000 hours of continuous operation
A given cable has characteristic impedance Z0 = 100 Ohms. At a given position on the line, the voltage amplitude is 1 V. Draw a sketch (a snapshot at a fixed time) of the forward-traveling voltage and current waves on the line, showing their amplit..
A three phase, 25-hp, 440-V, 60-Hz, 1750 rpm, wound-rotor induction motor has the following equivalent circuit parameters: R1=0.20 ohms, X1=1.0 ohms, R2=0.15 ohms, X2=0.8 ohms, Xm=30 ohms. The motor is connected to a three phase, 440-V, 60-Hz supply.
If a 100 W light bulb illuminates the ceiling with a beamradius of 2m at a distance of 4m, calculate the intensity of thelight on the ceiling. The light bulb has an efficiency of 15%(i.e., only 15% of the total power provides light power.)
The volume of a gas is 20 cc at 27°C. Pressure remaining constant. What is the temperature at which the volume of gas becomes 40 cc
A coil has an inductance of 400 mH and aresistance, RL, of 10 Ω. The coil is connected in series with a 100 Ω resistor Racross a 240V - 50Hz supply voltage V. Sketch the circuit diagram and phasor diagram; take V as the reference phasor.
a boatman must carry a wolf a goat and a cabbage across a river in a boat which is so small that he can carry at most
The following 4 differential equations describe mass spring systems. Identify each system as either undamped, overdamped, underdamped, or critically damped (Justify your answer). Determine the angular frequency and period for the undamped and the ..
Consider the following matrix of expected profits (in units of $1K) versus potential future material price scenarios (P1 - P5), for five different designs (D1 - D5): P1 P2 P3 P4 P5 D1 10 20 30 40 50 D2 20 25 25 30 35
Given a two-dimensional array named number of three rows and four columns of type int, write the single code statement that will both declare and initialize the array such that the first row is initialized to 0, 1, 2, 3
Two generators are connected in parallel to the same bus bar and each has an inductive reactance of 10% on rating. Generator 1 is rated 2,500 kVA and 2.4 kV, and generator 2 is rated 5,000 kVA and 2.4 kV.
How does the increase in the kinetic energy of a proton compare with the increase in kinetic energy of the alpha particle in part?
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