Potential: If the result of your calculation of a quantity has SI units kg ∙ m2/(s2...
Potential: If the result of your calculation of a quantity has SI units kg ∙ m2/(s2 ∙ C), that quantity could be
| an electric potential difference. |
| a dielectric constant. |
| a capacitance |
| an electric field strength. |
| an electric potential energy. |
Homework Answers
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Potential: If the result of your calculation of a quantity has
SI units kg ∙ m2/(s2...
(a) State the units of electric potential and electric potential energy. Sketch an equipotential ...
(a) State the units of electric potential and electric potential energy. Sketch an equipotential surface at a distance r from a point charge q and state the magnitude of the work done in moving a small test charge along that surface. [5 marks] (b) The figure below shows four representations (labelled A, B, C and D, respectively), of the electric field lines between the plates of a parallel plate capacitor. Identify which drawing is correct and indicate what is incorrect...
K=p² The dimensions of the quantity kinetic energy, designated by K, are kg. m2/s2. It can...
K=p² The dimensions of the quantity kinetic energy, designated by K, are kg. m2/s2. It can be written in terms of the momentum p and mass m as che non (a) What are the units of momentum in terms of fundamental SI units? (Use the following as necessary: kg, m, and s.) [p] = (b) Force is measured in units of newtons, N, where 1 N = 1 kg m/s? What are the units of momentum p in terms of...
A parallel-plate capacitor has plates of area 0.13 m2 and a separation of 1.9 cm. A battery...
A parallel-plate capacitor has plates of area 0.13 m2 and a separation of 1.9 cm. A battery charges the plates to a potential difference of 150 V and is then disconnected. A dielectric slab of thickness 9.3 mm and dielectric constant 4.0 is then placed symmetrically between the plates. (a) What is the capacitance before the slab is inserted? (b) What is the capacitance with the slab in place? What is the free charge q (c) before and (d) after the slab is inserted? What is the magnitude of the...
The electrostatic potential is V(x.y, z) = a(x2- y2). What are the SI units for the...
The electrostatic potential is V(x.y, z) = a(x2- y2). What are the SI units for the constant a? Calculate: (a) the electric field E: (b) Vx E; Is Va possible electrostatic potential?; (c) the charge density p: (d) the energy density.
Which among the following statements is CORRECT? O Electric potential is a vector quantity 。If the...
Which among the following statements is CORRECT? O Electric potential is a vector quantity 。If the strength of a uniform electric field doubles, then the associated electric potential difference must double f the charge on a capacitor is doubled, the energy stored in the capacitor must have halved OThe capacitance of a capacitor is determined by the size of the battery it is connected to. QUESTION 2 A charge is released from rest in a uniform electric field of magnitude...
Calculation: Neatly solve the question in the space provided. Demonstrate all important steps and include units....
Calculation: Neatly solve the question in the space provided. Demonstrate all important steps and include units. Your final answer must be written in the box to be considered correct. 1 point each. 6) A 2nC point charge and electric field form a system. If the charge moves through a potential difference of +10 V, what is the potential energy change of the system? Answer: 7) The average field between two points is 100 N/C. If the points are that are...
Answers (a) A = 53.8 m2, edge has length 7.34 m, (b) 50,000 V/m, (c) 13.8...
Answers (a) A = 53.8 m2, edge has length 7.34 m, (b) 50,000
V/m,
(c) 13.8 μJ
Note: For (b) I used E = σ / (κ ε0 ) and in (c) I used U =
Q2/(2C)
2. Teflon-Filled Capacitor A parallel-plate capacitor is made by placing a 10 μm layer of Teflon between two aluminum sheets. The dielectric constant of Teflon is K = 2.1 . The capacitance is C= 100 μF. The capacitor is square in shape. A...
The dielectric to be used in a parallel-plate capacitor has a dielectric constant of 3.9 and...
The dielectric to be used in a parallel-plate capacitor has a dielectric constant of 3.9 and a dielectric strength of 1.9 × 107 V/m. The capacitor is to have a capacitance of 1 × 10-9 F and must be able to withstand a maximum potential difference of 5,500 V. What is the minimum area the plates of the capacitor may have? (Give your answer in scientific notation using m2 (meter square) as unit)
A kg/m B m/s2 C kg*m/s D kg*m2/s2- Joule E kg*m/s2 F kg/s2 G m/(kg*s) H...
A kg/m B m/s2 C kg*m/s D kg*m2/s2- Joule E kg*m/s2 F kg/s2 G m/(kg*s) H m*s I kg*s What do each of these units correspond to? (for example, kgm^2/s^2) is equal to energy, which is a joule.)
The units of energy can be expressed as: a. Kg m2/s2 b. Joules c. N-m d....
The units of energy can be expressed as: a. Kg m2/s2 b. Joules c. N-m d. All of the above e. None of the above
(a) State the units of electric potential and electric potential energy. Sketch an equipotential surface at a distance r from a point charge q and state the magnitude of the work done in moving a small test charge along that surface. [5 marks] (b) The figure below shows four representations (labelled A, B, C and D, respectively), of the electric field lines between the plates of a parallel plate capacitor. Identify which drawing is correct and indicate what is incorrect...
K=p² The dimensions of the quantity kinetic energy, designated by K, are kg. m2/s2. It can be written in terms of the momentum p and mass m as che non (a) What are the units of momentum in terms of fundamental SI units? (Use the following as necessary: kg, m, and s.) [p] = (b) Force is measured in units of newtons, N, where 1 N = 1 kg m/s? What are the units of momentum p in terms of...
The electrostatic potential is V(x.y, z) = a(x2- y2). What are the SI units for the constant a? Calculate: (a) the electric field E: (b) Vx E; Is Va possible electrostatic potential?; (c) the charge density p: (d) the energy density.
Which among the following statements is CORRECT? O Electric potential is a vector quantity 。If the strength of a uniform electric field doubles, then the associated electric potential difference must double f the charge on a capacitor is doubled, the energy stored in the capacitor must have halved OThe capacitance of a capacitor is determined by the size of the battery it is connected to. QUESTION 2 A charge is released from rest in a uniform electric field of magnitude...
Calculation: Neatly solve the question in the space provided. Demonstrate all important steps and include units. Your final answer must be written in the box to be considered correct. 1 point each. 6) A 2nC point charge and electric field form a system. If the charge moves through a potential difference of +10 V, what is the potential energy change of the system? Answer: 7) The average field between two points is 100 N/C. If the points are that are...
Answers (a) A = 53.8 m2, edge has length 7.34 m, (b) 50,000
V/m,
(c) 13.8 μJ
Note: For (b) I used E = σ / (κ ε0 ) and in (c) I used U =
Q2/(2C)
2. Teflon-Filled Capacitor A parallel-plate capacitor is made by placing a 10 μm layer of Teflon between two aluminum sheets. The dielectric constant of Teflon is K = 2.1 . The capacitance is C= 100 μF. The capacitor is square in shape. A...
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