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A head is (approximately) a conducting sphere of radius 10 cm. What is the capacitance of the head? What will be the charge on the head if, by means of a Van De Graaf generator, you raise the potential on the head to 100,000 V?
What voltage would be required to cause electrostatic break down in air, |E? | = 3 × 10^6 volts/m? Now assume that we place a sharp object with radius of curvature r = 0.1 mm in electrical contact with your head to that it forms a series circuit with your head.
What are the answers to the questions above now?
You have a parallel plate capacitor of area A, gap d and two dielectric materials of constants κ1 and κ2. You only have enough of each material to fill 1/2 of the capacitor volume. Which arrangement maximizes the capacitance? Why?
Attachment:- Physics problems 2.docx
a) Find the intersection of the two lines. b) Find two vectors that also describe the two lines originating from the intersection. c) Find the angle between the two lines.
Calculate the divide-by-N value required to produce a 1.190 MHz frequency using a 10.24 MHz crystal on the 145106 with a divide-by-1024 crystal circuit. What is the range of frequencies directly usable with this configuration
Find the coefficients of reflection for fresh water (with relative permittivity equal to 81) of a vertically polarized wave that hits the water surface at an incident angle of 60o.
A measurement system uses an 8-bit A/D converter as output for itssignal in a range of 0 to 10 volts. What is the resolution for this measurement system If a7-bit A/D converter or a 9-bit A/D converter to be used, what is the resolution for the sys..
Suppose a car is traveling at +23.2 m/s, and the driver sees a traffic light turn red. After 0.563 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 7.00 m/s2. What is the stopping distance of the car
Design a 4-bit down counter with truncated sequence that count down a truncated sequence from 1111 to 0101. On reachingthe count value 0101, the counter must preset to 1111. Also draw its timing diagram.
Dc input supply voltage VS = 48 V dc, where as the source available is an ac with 230 V (rms). Determine the values of Le and Ce for the output LC-filter. Determine the (peak and rms) voltage ratings and the (average, rms, and the peak) current for a..
If we wish to design a communication system which carries voice securely, we need to ensure that others cannot tap into the conversation. In digital transmissions, we can do this by encryption.
the z-axis carries a 10mA current in the +z direction. A second line of current parallel to the first is located at x= 0, y=3cm carrying a 10 mA current in the -z direction. A rod exists in the y-z-plave from y= 1cm to y= 2 cm. velocity u = 2m/s z..
consider the (100),(110), and (111) planes in silicon. (a) which plane has the highest surface density of atoms. what is that density. (b) which plane has the smallest surface density of atoms. what is that density.
A certain logic family has the following voltage parameters: VIH(min)=3.5V , VIL(max)=1.0V; VOH(min)=4.9V, VOL(max)=0.1V a) What is the largest positive-going noise spike that can be tolerated
In a particular technology, a small BJT operating at vBE = 28VT conducts a collector current of 100 µA. What is the corresponding saturation current. For a transistor in the same technology but with an emitter junction that is 32 times larger.
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