Van de Graff generators can produce voltages as high as 5 million volts. This is accomplished...
Van de Graff generators can produce voltages as high as 5 million volts. This
is accomplished through the build up of charge on a hollow metal sphere that
sits on top of an insulating stand. A demonstration version has a diameter
of 40 cm and is charged to a potential of 250,000 V. a.) How much charge is
on the sphere? b.) What is the potential energy of a 1 ?C charge placed 1 m
away from the surface of the sphere?
Homework Answers
potential V = Kq/r
so charge q = 250000* 0.4/9e9
q = 11.11 uC
b. POT eenrgy U= Kq1q2/r
U = 9e9 *11.11uc * 1uc/1
U = 0.1 J
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Van de Graff generators can produce voltages as high
as 5 million volts. This
is accomplished...
2. A uniform charge of Q is placed on the sphere of a Van de Graff...
2. A uniform charge of Q is placed on the sphere of a Van de Graff generator, such that electron discharge is observed from a conducting point a distance of 46 cm away (center to center). Let the dielectric strength of air... E-3 x 10 N/C Determine the Electric Potentials at the 50 cm and 80 cm radial locations a) b) A small air balloon of charge q8.4 nC and mass 1.76 grams, is placed at rest at the 80...
PartI-Van de Graff Generator Demonstration: In this part of the experiment, the TA will require a...
PartI-Van de Graff Generator Demonstration: In this part of the experiment, the TA will require a few student demonstrators to perform the activity below before the class answers the questions that follow. The student volunteer must stand on the rubber mat next to the Van de Graff generator and place your hand on top of the generator. Have another volunteer turn the generator on. While the generator is charging, shake your head. 1. What do you observe? 2. What do...
1. A Van de Graaff generator has a metal sphere on the top with a radius...
1. A Van de Graaff generator has a metal sphere on the top with a radius of 15.0 cm. It is charged to the point where the total charge on the surface of the sphere is +3.50 µC. (a) What sort of particles have (probably) been added to or removed from the surface of the Van de Graaff generator? How many of them have been added or removed? (b) A small metal ball (1.00 cm radius) mounted on an insulating...
A Van de Graaff generator (like the one used in class) has a metal sphere on...
A Van de Graaff generator (like the one used in class) has a metal sphere on the top with a radius of 15.0 cm. It is charged to the point where the total charge on the surface of the sphere is +3.50 μC ? (e) What is the charge on the Van de Graaff generator now? (f) Suppose that by a “long distance” we mean 2.00 m (this is long enough for our purposes). In other words, the center of...
(10%) Problem 3: A research-level Van de Graaff generator has a 2.05 m diameter metal sphere...
(10%) Problem 3: A research-level Van de Graaff generator has a 2.05 m diameter metal sphere with a charge of 5.1 mC on it. 33% Part a) What is the potential near its surface in MV? Assume the potential is equal to zero far away from the surface. Grade Summary Deductions 8% Potential V- 4.47-I 92% sin0 cotanasin acos atanacotan sinhO cosh0 tanhOcotanh0 78 9 HOME Submissions Attempts remaining:6 (2% per attempt) detailed view 0 END 2% 2% 2% 2%...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
2. A uniform charge of Q is placed on the sphere of a Van de Graff generator, such that electron discharge is observed from a conducting point a distance of 46 cm away (center to center). Let the dielectric strength of air... E-3 x 10 N/C Determine the Electric Potentials at the 50 cm and 80 cm radial locations a) b) A small air balloon of charge q8.4 nC and mass 1.76 grams, is placed at rest at the 80...
PartI-Van de Graff Generator Demonstration: In this part of the experiment, the TA will require a few student demonstrators to perform the activity below before the class answers the questions that follow. The student volunteer must stand on the rubber mat next to the Van de Graff generator and place your hand on top of the generator. Have another volunteer turn the generator on. While the generator is charging, shake your head. 1. What do you observe? 2. What do...
(10%) Problem 3: A research-level Van de Graaff generator has a 2.05 m diameter metal sphere with a charge of 5.1 mC on it. 33% Part a) What is the potential near its surface in MV? Assume the potential is equal to zero far away from the surface. Grade Summary Deductions 8% Potential V- 4.47-I 92% sin0 cotanasin acos atanacotan sinhO cosh0 tanhOcotanh0 78 9 HOME Submissions Attempts remaining:6 (2% per attempt) detailed view 0 END 2% 2% 2% 2%...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
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