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1) A parallel-plate capacitor has a capacitance of c1 = 3.5 uF when filled with air and c2 = 23 uF when filled with a dielectric oil at potential difference of 12 V. Take the vacuum permittivity to be Eo = 8.85 * 10-12 C2/(N*m2).
a) Input an expression for the permittivity of the oil ?.
b) What is the permittivity of this oil in C2/(N?m2)?
c) How much more charge (delta q) in C does the capacitor hold when filled with oil relative to when its filled with air?
2)A nervous physicist worries that the two metal shelves of his wood frame bookcase might obtain a high voltage difference if charged by static electricity, perhaps produced by friction.
a) What is the capacitance of the empty shelves if they have area 1*103 cm2 and are 0.19 m apart in F?
b) What is the potential difference between them if opposite charges of magnitude 2.00 nC are placed on them in V?
c) To show that this voltage poses a small hazard, calculate the energy stored in J.
Calculate the total cost ($/kWh) of electricity delivered to the grid including fuel cost and debt charge with O&M of 5% added to the total.
If a car traveling at 55 km/h will skid 24 m while its brakes lock, how far will it skid if it is traveling at 130 km/h when its brakes lock.
If you were to use wire of twice the diameter, which of the above answers would change? Would they increase or reduce.
What is magnitude of the gravitational attraction
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A child and sled with a combined mass of 55.20 kg slide down a frictionless hill that is 7.84 m high at an angle of 26o from horizontal. The acceleration of gravity is 9.80 m/s2. If the sled starts from rest, what is its speed at the bottom of hil..
When two resistors are connected in a parallel configuration the voltages across each are the same, What are the currents through these resistors
Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
A horizontal pipe contains water at a pressure of 150 {rm kPa} flowing with a speed of 1.30 {rm m/s}. The pipe narrows to one-half its original diameter. What is the speed of the water.
A point charge q(1)= 85.9 micro C is held fixed at the origin. A second point charge, with mass m = 6.00×10?2kg and charge q(2)= -2.36 micro C , is placed at the location (0.323 m, 0).
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