PHY_211_ADDITIONAL_REVISION_QUESTION_
... measures a stopping potential of 1V. 2V, 3V, 4V, and 5V for light of wavelengths 400nm,300nm, 240nm, 200nm and 171nm respectively. Determine the work function for this material and the value of the plank’s constant. For each wavelength, calculate the maximum kinetic energy and the velocity of the em ...
... measures a stopping potential of 1V. 2V, 3V, 4V, and 5V for light of wavelengths 400nm,300nm, 240nm, 200nm and 171nm respectively. Determine the work function for this material and the value of the plank’s constant. For each wavelength, calculate the maximum kinetic energy and the velocity of the em ...
3318 Homework 8
... Date due: April 4, 2017 Do Probs. 1-8. (You are welcome to do the other problems as well for extra practice, but only these should be turned in.) ...
... Date due: April 4, 2017 Do Probs. 1-8. (You are welcome to do the other problems as well for extra practice, but only these should be turned in.) ...
Midterm 2: Tue Nov 15 (Chs 11, 13, 14, 15, 19, 20)
... A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by. The speed of the wave is A) 15 m/s. ...
... A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by. The speed of the wave is A) 15 m/s. ...
EECS 215: Introduction to Circuits
... Construct an imaginary Gaussian cylinder of radius r and height h: ...
... Construct an imaginary Gaussian cylinder of radius r and height h: ...
Key to study guide for midterm: all pages File
... Increase concentration: more of a chance of reactants reacting Increase temperature: as particles move quickly, more chance they will collide and react Inhibitor: slows down a reaction ...
... Increase concentration: more of a chance of reactants reacting Increase temperature: as particles move quickly, more chance they will collide and react Inhibitor: slows down a reaction ...
Review for Spring Semester Final
... Force is a vector. It has both magnitude and direction. Its magnitude is measured in pounds or Newtons. Newton’s first law says that an object will remain at rest or will continue in a straight line unless it is acted on by a net force. Unbalance forces result in net force acting on an object. ...
... Force is a vector. It has both magnitude and direction. Its magnitude is measured in pounds or Newtons. Newton’s first law says that an object will remain at rest or will continue in a straight line unless it is acted on by a net force. Unbalance forces result in net force acting on an object. ...
tutorial 2: answer
... 0 / 4 . If l 5C / m , compute E at (0,0, z ) and then evaluate it at: a) The origin. b) z = 5 cm c) z = -5cm ...
... 0 / 4 . If l 5C / m , compute E at (0,0, z ) and then evaluate it at: a) The origin. b) z = 5 cm c) z = -5cm ...
971 Quiz 01
... current direction is opposite to that of the applied electric field. But the electrons diffusion current is in the same direction of the applied electric field. ...
... current direction is opposite to that of the applied electric field. But the electrons diffusion current is in the same direction of the applied electric field. ...
Department of Physical Sciences (Physics)
... (iii) A typical semiconductor has a band gap of 1.1 eV at room temperature and an effective density of states in the conduction band of 2.0 × 1019 cm-3. A donor state lies 40 meV below the conduction band edge. If the density of donors is 5.0 × 1015 cm-3 calculate (a) the position of the Fermi level ...
... (iii) A typical semiconductor has a band gap of 1.1 eV at room temperature and an effective density of states in the conduction band of 2.0 × 1019 cm-3. A donor state lies 40 meV below the conduction band edge. If the density of donors is 5.0 × 1015 cm-3 calculate (a) the position of the Fermi level ...
Home Work Solutions 6
... 3. Earth's lower atmosphere contains negative and positive ions that are produced by radioactive elements in the soil and cosmic rays from space. In a certain region, the atmospheric electric field strength is 120 V/m and the field is directed vertically down. This field causes singly charged positi ...
... 3. Earth's lower atmosphere contains negative and positive ions that are produced by radioactive elements in the soil and cosmic rays from space. In a certain region, the atmospheric electric field strength is 120 V/m and the field is directed vertically down. This field causes singly charged positi ...
Physics 4183 Electricity and Magnetism II Ohm`s Law
... This states that there is no charge density inside a conductor with a uniform current, this also states that Laplace’s equation (∇2 Φ = 0) also holds. The previous example stated that if a charge density is placed inside a conductor, it will flow to the surface. This example states that for a steady ...
... This states that there is no charge density inside a conductor with a uniform current, this also states that Laplace’s equation (∇2 Φ = 0) also holds. The previous example stated that if a charge density is placed inside a conductor, it will flow to the surface. This example states that for a steady ...
Homework #6 203-1-1721 ... Part A
... related to the current i by ∆V = (3.55 x 106 V/A2)i2. (a) Find the resistance when the current is 2.40 mA. (b) At what value of the current is the resistance equal to 16.0 Ω? 28. Calculate the mean free time τ between collisions for conduction electrons in aluminum at 20 °C using tables from the lec ...
... related to the current i by ∆V = (3.55 x 106 V/A2)i2. (a) Find the resistance when the current is 2.40 mA. (b) At what value of the current is the resistance equal to 16.0 Ω? 28. Calculate the mean free time τ between collisions for conduction electrons in aluminum at 20 °C using tables from the lec ...
Homework #6 203-1-1641 Physics 2 for Students of Structural
... related to the current i by ∆V = (3.55 x 106 V/A2)i2. (a) Find the resistance when the current is 2.40 mA. (b) At what value of the current is the resistance equal to 16.0 Ω? 28. Calculate the mean free time τ between collisions for conduction electrons in aluminum at 20 °C using tables from the lec ...
... related to the current i by ∆V = (3.55 x 106 V/A2)i2. (a) Find the resistance when the current is 2.40 mA. (b) At what value of the current is the resistance equal to 16.0 Ω? 28. Calculate the mean free time τ between collisions for conduction electrons in aluminum at 20 °C using tables from the lec ...
Homework No. 04 (Fall 2013) PHYS 520A: Electromagnetic Theory I
... If B varies over a characteristic distance L, what is the characteristic time τ for the decay of the field? Estimate τ for the Earth’s core, where L ∼ 106 m and σ ∼ 107 mho/m. Compare this time with the current estimates for geomagnetic reversal time. 4. Plot the following as a function of ω: (a) Re ...
... If B varies over a characteristic distance L, what is the characteristic time τ for the decay of the field? Estimate τ for the Earth’s core, where L ∼ 106 m and σ ∼ 107 mho/m. Compare this time with the current estimates for geomagnetic reversal time. 4. Plot the following as a function of ω: (a) Re ...
Jackson 5.6 Homework Problem Solution
... and the direction coming out of the page as the positive z direction. If a uniform current density J0 flows in the positive z direction everywhere colored blue in the leftmost image, this is equivalent to a uniform current density J0 flowing in the positive z direction everywhere in the cylinder plu ...
... and the direction coming out of the page as the positive z direction. If a uniform current density J0 flows in the positive z direction everywhere colored blue in the leftmost image, this is equivalent to a uniform current density J0 flowing in the positive z direction everywhere in the cylinder plu ...
J s - Ece.umd.edu
... This equation can be integrated if both sides are first multiplied by 2dV/dy. The result is ...
... This equation can be integrated if both sides are first multiplied by 2dV/dy. The result is ...
Exam No. 02 (Fall 2013) PHYS 520A: Electromagnetic Theory I
... Plot [Reχ(ω)] as a function of ω. 4. Consider a circular loop of wire carrying current I whose magnetic moment is given by µ = IAn̂, where n̂ points perpendicular to the plane containing the loop (satisfying the right hand sense) and A is the area of the loop. Consider the case n̂ = x̂. What is the ...
... Plot [Reχ(ω)] as a function of ω. 4. Consider a circular loop of wire carrying current I whose magnetic moment is given by µ = IAn̂, where n̂ points perpendicular to the plane containing the loop (satisfying the right hand sense) and A is the area of the loop. Consider the case n̂ = x̂. What is the ...
Problem 2.13 The resistivity of a silicon wafer at room temperature is
... The electron density in silicon at room temperature is twice the intrinsic density. Calculate the hole density, the donor density and the Fermi energy relative to the intrinsic energy. Repeat for n = 5 ni and n = 10 ni. Also repeat for p = 2 ni, p = 5 ni and p = 10 ni, calculating the electron and a ...
... The electron density in silicon at room temperature is twice the intrinsic density. Calculate the hole density, the donor density and the Fermi energy relative to the intrinsic energy. Repeat for n = 5 ni and n = 10 ni. Also repeat for p = 2 ni, p = 5 ni and p = 10 ni, calculating the electron and a ...
Problem Set 8
... (1) A conducting sphere, radius R, floats exactly half-submerged in a liquid dielectric with relative permittivity !1 . Another less-dense fluid has relative permittivity ! 2 and floats on top so that it surrounds the other half of the sphere. The fluids extend essentially to infinity. (a) With tota ...
... (1) A conducting sphere, radius R, floats exactly half-submerged in a liquid dielectric with relative permittivity !1 . Another less-dense fluid has relative permittivity ! 2 and floats on top so that it surrounds the other half of the sphere. The fluids extend essentially to infinity. (a) With tota ...
S operator( ). 2) Magnetic field is applied along positive Z axis. Find
... (a) Calculate the density matrix for (i) the state polarized at 45o and (ii) the state polarized at 135o. (b) What is the density matrix for a mixed state in which 50% of the light is polarized along 45o and 50% along the 135o? (c) What is the density matrix for a mixed state in which 50% of the lig ...
... (a) Calculate the density matrix for (i) the state polarized at 45o and (ii) the state polarized at 135o. (b) What is the density matrix for a mixed state in which 50% of the light is polarized along 45o and 50% along the 135o? (c) What is the density matrix for a mixed state in which 50% of the lig ...
Solid State 3, Problem Set 2 Lecturer: Eytan Grosfeld
... Hamiltonian H = vσ · p where σa are Pauli matrices (a = x, y) related to the electronic spin and v is a velocity. The momentum p is two-dimensional. Assume half filling and zero temperature. (a) Diagonalize the Hamiltonian and write the (two-component) wavefunctions associated with a given momentum ...
... Hamiltonian H = vσ · p where σa are Pauli matrices (a = x, y) related to the electronic spin and v is a velocity. The momentum p is two-dimensional. Assume half filling and zero temperature. (a) Diagonalize the Hamiltonian and write the (two-component) wavefunctions associated with a given momentum ...
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... 3. Assuming the density structure across the Snake River Plain can be simplified as the following plot and the system reaches isostatic equilibrium, (a) estimate the topographic difference between location A and B. Estimate the gravity acceleration difference between location A and B (b) before any ...
... 3. Assuming the density structure across the Snake River Plain can be simplified as the following plot and the system reaches isostatic equilibrium, (a) estimate the topographic difference between location A and B. Estimate the gravity acceleration difference between location A and B (b) before any ...