Homework Answers
For conducting material, there will be no movement of the charges on connecting the left wire, as for flow of charge there must be a potential difference across the conducting material which is not the case for this conducting material as there is no source of emf connected across the ends of the conducting material.
For the insulating material also there will be no movement of charges as the insulator offers infinite resistance to the flow of charges through it.
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Suppose we connect a block of conducting material that has a net negative charge to two...
Suppose we connect a block of conducting material that has a net negative charge to two...
Suppose we connect a block of conducting material that has a net negative charge to two wires and a small light bulb as shown below. The wire to the left of the conducting material is now brought into contact with the conducting material. Will there be any movement when this final connection is made? If yes, which way and for how long? If no, why not? EXPLAIN! In a second situation, we replace the conducting material with a block of...
Suppose that equal amounts of excess negative charge: 5) Suppose that equal amounts of excess negative...
Suppose that equal amounts of excess negative charge:
5) Suppose that equal amounts of excess negative charge are deposited on the left side of the two spheres (where the arrow is pointing). One is made of an insulating material and the other made of a conducting material. Sketch how you would expect the excess charge distributions to differ between the two. Explain. Insulator Conductor
Will a penny be slightly more massive if it has a negative or a positive net...
Will a penny be slightly more massive if it has a negative or a positive net charge? (Think very small!!) (a) It will be just as massive either way. (b) More massive if negative. (c) More massive if positive. A charged conducting object is brought close to a neutral insulating object. Which of the following is true? (a) The objects will repel. (b) The objects will attract. (c) Nothing will happen, no attraction, no repulsion. (d) The objects will repel...
Two separate parallel long (infinitely long) wires in air and parallel to the ground are separated by a distance D = 1.0m. They are made of conducting material. Each has a radius a 2.0cm, and opposit...
Two separate parallel long (infinitely long) wires in air and parallel to the ground are separated by a distance D = 1.0m. They are made of conducting material. Each has a radius a 2.0cm, and opposite/equal amounts of charge density (λι = Qit/L and Az = QL). The voltage difference between the wires is ΔΙ. = 440 Vlts. Let's label this pair as pair A (a) What is the potential difference between a pair of long telephone wires (pair B)...
3) Two thin conducting wires are used to connect very large conducting plates to opposite poles...
3) Two thin conducting wires are used to connect very large conducting plates to opposite poles of a battery. Chemical reactions within the battery produce an emf E that "pushes" one electr after another onto the wire connected to the negative terminal of the battery, and "pulls" one electron after another from the wire connected to the positive terminal of the battery on electrons pulled in electrons battery pashed out conducting plate a) Given that positive charges repel each other...
This problem explores the behavior of charge on realistic (i.e. non-ideal) insulators. We take as an...
This problem explores the behavior of
charge on realistic (i.e. non-ideal) insulators. We take as an
example a long insulating rod suspended by insulating wires. Assume
that the rod is initially electrically neutral. For convenience, we
will refer to the left end of the rod as end A, and the right end
of the rod as end B. In the answer options for this problem,
"weakly attracted/repelled" means "attracted/repelled with a force
of magnitude similar to that which would exist...
A) two conducting... (seen in picture) B)What is the negative charge? charges, tw0 p ch having...
A) two conducting... (seen in picture)
B)What is the negative charge?
charges, tw0 p ch having a magnitude of 59 uC at the vertices of an equilateral cm on a side) 4. gain protons. 5. lose electrons. +q 024 (part 1 of 2) 10.0 points Two conducting spheres have identical radii. Initially they have charges of opposite sign and unequal magnitudes with the magnitude of the positive charge larger than the mag- nitude of the negative charge. They attract -q...
Monday Homework Problem 1.4 Your standard number 2 mechanical pencil has a graphite lead with mass...
Monday Homework Problem 1.4 Your standard number 2 mechanical pencil has a graphite lead with mass 0.05g. How many protons are in this quantity of graphite? The atomic mass of carbon is 12g/mole and the atomic number is 6. Select One of the Following: (a) 3.1 x 1010 protons (b) 1.5 x 1022 protons (c) 5.1 x 1024protons (d) 2.3 x 1021 protons (e) 6.5 x 1023 protons Monday Homework Problem 1.5 The dielectric plate of an electrophorus is charged...
In class, I argued that for two (conducting) charged plates with respective charge densities ±Q/A we...
In class, I argued that for two (conducting) charged plates with respective charge densities ±Q/A we can add their fields to find the overall field strength due to two parallel charged plates. While that is the correct result I want you to show that this indeed the case by considering the following scenario with conducting sheets of finite thickness: (a) Take one negatively charged plate and add an uncharged conducting slab of equal dimension across from it such that they...
A solid insulating sphere of radius a carries a net positive charge +2Q, uniformity distributed throughout...
A solid insulating sphere of radius a carries a net positive charge +2Q, uniformity distributed throughout its volume. Concentric with this sphere is a conducting spherical shell with inner radius b and outer radius c, having a net charge of -3Q. Let the variable r represent the radial variable defined from the center of the sphere to an arbitrary point of interest defined by the following questions. A) Derive an expression for the electric field only in terms of the...
Suppose we connect a block of conducting material that has a net negative charge to two wires and a small light bulb as shown below. The wire to the left of the conducting material is now brought into contact with the conducting material. Will there be any movement when this final connection is made? If yes, which way and for how long? If no, why not? EXPLAIN! In a second situation, we replace the conducting material with a block of...
Suppose that equal amounts of excess negative charge:
5) Suppose that equal amounts of excess negative charge are deposited on the left side of the two spheres (where the arrow is pointing). One is made of an insulating material and the other made of a conducting material. Sketch how you would expect the excess charge distributions to differ between the two. Explain. Insulator Conductor
Will a penny be slightly more massive if it has a negative or a positive net charge? (Think very small!!) (a) It will be just as massive either way. (b) More massive if negative. (c) More massive if positive. A charged conducting object is brought close to a neutral insulating object. Which of the following is true? (a) The objects will repel. (b) The objects will attract. (c) Nothing will happen, no attraction, no repulsion. (d) The objects will repel...
Two separate parallel long (infinitely long) wires in air and parallel to the ground are separated by a distance D = 1.0m. They are made of conducting material. Each has a radius a 2.0cm, and opposite/equal amounts of charge density (λι = Qit/L and Az = QL). The voltage difference between the wires is ΔΙ. = 440 Vlts. Let's label this pair as pair A (a) What is the potential difference between a pair of long telephone wires (pair B)...
3) Two thin conducting wires are used to connect very large conducting plates to opposite poles of a battery. Chemical reactions within the battery produce an emf E that "pushes" one electr after another onto the wire connected to the negative terminal of the battery, and "pulls" one electron after another from the wire connected to the positive terminal of the battery on electrons pulled in electrons battery pashed out conducting plate a) Given that positive charges repel each other...
This problem explores the behavior of
charge on realistic (i.e. non-ideal) insulators. We take as an
example a long insulating rod suspended by insulating wires. Assume
that the rod is initially electrically neutral. For convenience, we
will refer to the left end of the rod as end A, and the right end
of the rod as end B. In the answer options for this problem,
"weakly attracted/repelled" means "attracted/repelled with a force
of magnitude similar to that which would exist...
A) two conducting... (seen in picture)
B)What is the negative charge?
charges, tw0 p ch having a magnitude of 59 uC at the vertices of an equilateral cm on a side) 4. gain protons. 5. lose electrons. +q 024 (part 1 of 2) 10.0 points Two conducting spheres have identical radii. Initially they have charges of opposite sign and unequal magnitudes with the magnitude of the positive charge larger than the mag- nitude of the negative charge. They attract -q...
Monday Homework Problem 1.4 Your standard number 2 mechanical pencil has a graphite lead with mass 0.05g. How many protons are in this quantity of graphite? The atomic mass of carbon is 12g/mole and the atomic number is 6. Select One of the Following: (a) 3.1 x 1010 protons (b) 1.5 x 1022 protons (c) 5.1 x 1024protons (d) 2.3 x 1021 protons (e) 6.5 x 1023 protons Monday Homework Problem 1.5 The dielectric plate of an electrophorus is charged...
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