The following data may be used if required: Permittivity of free space, co = 8.85 x 10-12 F.m-¹ Fundamental electronic charge, e = 1.602 × 10-¹⁹ C Avogadro's number, NA = 6.02 x 1023 19 1. (a) How many coulombs of positive charge are there in 1Kg of carbon? Each Carbon atoms has 6 protons and 6 electrons, and 12g of Carbon contain Avogadro's number of atoms. (b) Two equal charges of 0.3μC are on the y axis, with one at the origin and one at y = 6m. There is a third charge 3 = 2μC on the x axis at x = 8m. Find the force on charge 93. (c) Two charges +q and -3q are separated by a small distance. Sketch the electric field lines for this system. [4] [12] [4]

Some types of molecules that do not possess an intrinsic electric dipole moment can be given one by an external electric field in a process called charge separation, or polarization. In this process, their internal charge distribution becomes distorted by the field, which results in the region of a molecule on the side in the direction of the field gaining a positive net charge and the region on the other side gaining a negative net charge. Both charges have equal magnitudes, and the electric neutrality of the molecule as a whole is maintained. The electric field is said to induce an electric dipole moment in such a molecule. When the field is canceled, the molecule reverts to its unpolarized state and loses its electric dipole moment. The electric behavior of such a molecule can be modeled by a pair of ±1.60×10^−19 C charges connected by a spring with force constant 0.000711 N/m. The spring must be imagined as possessing zero relaxed length so that normally the charges overlap and the…

a. An electrically neutral penny, of mass 3.11 g, contains equal number of positive and negative charges. Assuming the penny is made of pure copper, what is the total positive (or negative) charge within a penny? Atomic mass of copper = 63.5 g/mol Na = 6.02 x 10 atoms / mol (Avogadro's number) CAADA Atomic Number of Copper = 29 protons/atom NOTE: you don't necessarily need chemistry for this.Dimensional analysis!!! b. Suppose the positive and negative charges could be isolated into two bundles and separated by a distance of 1.00 km. What would the force of attraction between the bundles be?

You have a neutral balloon. What is the charge after 17000 electrons have been removed from it? The elemental charge is 1.6 * 10^-19 C. Answer in units of micro coulombs

An object of mass 5 × 10-6 g is placed over a thin positively charged sheet of surface density of charge σ = 4.0 × 10-6C/m2 (figure shown below). Estimate the charge that should be given to this object so that upon release it will not fall down. Calculate the number of electrons that is to be removed to give this charge. How much mass loss is caused by this removal of electrons?

Figure shows the charge distribution in a water molecule, which is called a polar molecule because it has an inherent separation of charge. Given water’s polar character, explain what effect humidity has on removing excess charge from objects.

How many electrons are needed to form a charge of 4.00 nano-Coulomb? Write your answer in whole number.

A 40-g ball of copper has a net charge of 2.5 µC. What fraction of the copper's electrons have been removed? (Each neutral copper atom has 29 protons and 29 electrons, and copper has an atomic mass of 63.5 a.m.u.) Hint The fraction of electrons removed is (Note: Enter your answer this way. For example, if 1% of the electrons have been removed, enter "0.01" or "1E-2". Use the "E" notation to enter the number in scientific notation if needed. For example, to enter 3.14 x 10-¹2, type in "3.14E-12".)

A non-conducting material has a charge of -(9.8x10^0) µC. How many electrons were added to it, to provide this charge? Use 2 sgs in your answer. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 Answer

-1 The following data may be used if required: Permittivity of free space, co = 8.85 x 10-¹² F.m-¹ Fundamental electronic charge, e = 1.602 × 10-1⁹ C Avogadro's number, NA = 6.02 x 10²3 1. (a) How many coulombs of positive charge are there in 1Kg of carbon? Each Carbon atoms has 6 protons and 6 electrons, and 12g of Carbon contain Avogadro's number of atoms. (b) Two equal charges of 0.3μC are on the y axis, with one at the origin and one at y = 6m. There is a third charge 3 = 2μC on the x axis at x = 8m. Find the force on charge 93. (c) Two charges +q and -3q are separated by a small distance. Sketch the electric field lines for this system.