Electric Circuits & Fields Questions

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1)Asphalt roofing shingles are typically sold by the square, with a square covering 100 square feet. A contractor must shingle a roof that measures 65.5' x 35': How many squares will be required to cover this roof? A)25 B)33 C) 26 D)23 2)A measurement on a drawing states that a distance is 45.5 yards. What is the same distance in inches? A)1638 B)15.17" C)162

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A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius 10.0 centimeters, and the separation between the spheres is 1.50 centimeters. The magnitude of the charge on each sphere is 3.30 nanocoulombs. a)What is the magnitude of the potential difference ΔV between the two spheres? b)What is the electric-field energy stored in the capacitor?

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Case Scenario 3 Bobby has a learning disability in reading. He is overwhelmed by long reading passages, because he cannot read on grade level. Bobby needs to learn about main idea and supporting details. The teacher provides Bobby a story on his reading level. Bobby only has to identify the main idea while the rest of the class must identify the main idea and supporting details. Is this an example of an accommodation or modification? (circle) Are there other ways to address this student's need? How?

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Case Scenario 4 Patricia has a learning disability in mathematics. Her teacher has required her to complete the first 10 fast fact problems, but she does not have to reduce to simplest form). The rest of the class must complete the entire page of addition fractions and reduce to the simplest form, including challenging questions numbers 1-30. Is this an example of an accommodation or modification? (circle) Are there other ways to address this student's need? How?

Electrical Engineering

Electric Circuits & Fields Solutions

Case Scenario 3 Bobby has a learning disability in reading. He is overwhelmed by long reading passages, because he cannot read on grade level. Bobby needs to learn about main idea and supporting details. The teacher provides Bobby a story on his reading level. Bobby only has to identify the main idea while the rest of the class must identify the main idea and supporting details. Is this an example of an accommodation or modification? (circle) Are there other ways to address this student's need? How?

Electrical Engineering

Electric Circuits & Fields Solutions

Case Scenario 4 Patricia has a learning disability in mathematics. Her teacher has required her to complete the first 10 fast fact problems, but she does not have to reduce to simplest form). The rest of the class must complete the entire page of addition fractions and reduce to the simplest form, including challenging questions numbers 1-30. Is this an example of an accommodation or modification? (circle) Are there other ways to address this student's need? How?

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Electric Circuits & Fields Solutions

2. Consider the following circuit (18 pts): 500 mH mm 0.1H m 0.4H mm 102 A tos B 2.5 2 w 192 w 522 2 A 10 V 2.522 2A) Use the node voltage method to find the voltage difference between nodes A and B for t<0 s. (3 pts) 2B) Find the equivalent inductance of the inductor network. (2 pts) 2C) Find the steady-state voltage difference between nodes A and B for t>>0 s. (2 pts)

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2. Consider the following circuit (18 pts): 500 m m 0.1 H 0.4 H m 1022 A w 2.5 12 t = Os B w 12 w 522 2 A 10 V 2.5 2 2A) Use the node voltage method to find the voltage difference between nodes A and B for t< 0 s. (3 pts)

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Electric Circuits & Fields Solutions

Problem 2: Use the Biot-Savart Law Mo I de xr dB= 47 (4) to show that the magnetic field B at the center of a circular ring of radius R carrying current I has magnitude (Ho 1)/(2 R). What direction is the field? You might want to read up on the Biot-Savart methodology for computing a magnetic field from a current-carrying wire.

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0 Problem 1: The definition of the electric field E and magnetic field B is F =qE+vx B] (1) Gauss's Law and Ampere's Law are Q 3 (2) ffe.date d2 = 101 (3) Use these three equations to figure out the units of the inverse product 1/(Hoto). What extremely fundamental constant is this going to be related to? Obviously you can just look this up, but instead follow through the di- mensional analysis,

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Electric Circuits & Fields Solutions

I I 2a Problem 3: Consider a pair of very very long straight wires carrying cur- rent I, separated by a distance 2 a, connected at their ends by a semicircular are of wire of radius a as shown. What is the magnetic field B at the point indicated as Q? Give the magnitude and the direction of the field. Unlike what is shown in the drawing, the idea is that the straight portions go on for a very long distance: way way longer than a. Hint: You will want to use superposition and symmetry to solve this one, not the integral!

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Electric Circuits & Fields Solutions

Part B Find " Iad where I (X) is the Planck distribution formula of I(2) 2 hc2 1" (ehe/ART_1) (Hint: Change the integration variable from 1 to f.) You will need to use the following tabulated integral: er1 = 240 Express your answer in terms of the variable T, the Planck's constant h, the speed of light in vacuum c, and the Boltzmann's constant k. IVO AS ? I () d) = Submit Request Answer Part The result of part B is I and has the form of the Stefan-Boltzmann law, I =oT4. Evaluate the constants in B to find o. Express your answer in watts per meter squared per kelvin raised to the power 4 using three significant figures. WG| AE ? 0= W/m².K