1. Do I understand the definition of magnetic flux clear enough to be able to obtain...
1. Do I understand the definition of magnetic flux clear enough to be able to obtain it for a given system?
2. Do I understand the Faraday's and Lenz's law enough to be able to apply these laws and obtain followings? -- (1) induced emf, (2) induced current.
3. Do I understand how electric generators work? -- (1) AC electric power generator - (Vmax, frequency, angular frequency, period, current/emf direction, etc.), (2) DC electric power generator -- (magnitude, current/emf direction).
4. Do I know what Eddy current is and its applications?
5. Can I obtain the self-inductance and mutual-inductance?
Homework Answers
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1. Do I understand the definition of magnetic flux clear
enough to be able to obtain...
1 of 15 When a field is parallel to a plane of area, the magnetic flux...
1 of 15 When a field is parallel to a plane of area, the magnetic flux through the coil is A zero. B infinite. C 2. D 5. Question 2 of 15 A moving charge experiences magnetic forces because of a A magnetic flux. B magnetic field. C magnetic current. D both a and b. Question 3 of 15 Total number of magnetic field lines passing through an area is called A magnetic flux density. B magnetic flux. C emf....
Learning Goal: To understand the terms in Faraday's law and to be able to identify the...
Learning Goal: To understand the terms in Faraday's law and to be able to identify the magnitude and direction of induced emf. Faraday's law states that induced emf is directly proportional to the time rate of change of magnetic flux. Mathematically, it can be written as E=???B?t, where E is the emf induced in a closed loop, and ??B?t is the rate of change of the magnetic flux through a surface bounded by the loop. For uniform magnetic fields the...
3. Electromagnetic Inductance. Consider a single loop under magnetic field. (a) If the area A =...
3. Electromagnetic Inductance. Consider a single loop under magnetic field. (a) If the area A = 0.012[m) is constant, but the magnetic field is increasing at the rate of 0.020 T/s), determine the induced emf. (Use Faraday's law; the induced emf in a loop equals the absolute value of the time rate of change of the magnetic flux through the loop.) (b) If the total resistance of the circuit is 5.0(82), find the induced current. (c) Suppose we change the...
Objective: In this lab you will investigate magnets, electromagnets, electric motors, generators, and magnetic inductance and...
Objective: In this lab you will investigate magnets, electromagnets, electric motors, generators, and magnetic inductance and discuss their applications. Part 1: Magnetic Fields How do the lodestone and round magnet affect the compass needle? How can you tell which side is North and South? How is an electromagnet similar to a permanent magnet? How is it different? Part 2: Electric Motors Describe how a DC electric motor works. Part 3: Magnetic Induction In the setup with a gilley coil connected...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
1) Figure 1 shows an infinity long wire with current I in +x direction. A triangular...
1) Figure 1 shows an infinity long wire with current I in +x direction. A triangular loop with the each side equal L and the total resistance of R is placed initially at distance of do from the wire as shown in the figure. a) Find induced current (including the direction) if the loop is moving with constant velocity of v = voj. b) Find induced current (including the direction) if the loop is moving with constant velocity of j...
1) The armature of an ac generator is a rectangular coil 2.00 cm by 6.00 cm...
1) The armature of an ac generator is a rectangular coil 2.00 cm by 6.00 cm with 80 turns. It is immersed in a uniform magnetic field of magnitude 0.250 T. If the amplitude of the emf in the coil is 22.0 V, at what angular speed is the armature rotating? _______rad/s 2) The magnetic field between the poles of an electromagnet is 3.30 T. A coil of wire is placed in this region so that the field is parallel...
please show work when possible so that I may better understand. Thank you. x=L The rail gun consists of two thick conducting rails connected to a power supply and there is a magnetic field ass...
please show work when possible so that I may better
understand. Thank you.
x=L The rail gun consists of two thick conducting rails connected to a power supply and there is a magnetic field assumed to be uniform and constant in the direction shown. A short conducting bar that is to be (or carry) the projectile is placed across the bars at x -0. The current flows through the bars as shown. The magnetic force on the bar causes it...
1. Write an equation that describes voltage supplied by a wall outlet. (f = 60 Hz,...
1. Write an equation that describes voltage supplied by
a wall outlet.
(f = 60 Hz, Vrms = 120 V)
2. What is the instantaneous voltage of a sine wave at
half of a period?
Describe Alternating Current (AC). Explain how resistors, capacitors, and inductors behave in an AC circuit. WRITEUP REQUIREMENTS Informal: Questions - 6 pts, Data Tables - 3 pts, Survey Questions from Syllabus - 1 pt INTRODUCTION V Up to this point, we have been using supply...
3. Electromagnetic Inductance. Consider a single loop under magnetic field. (a) If the area A = 0.012[m) is constant, but the magnetic field is increasing at the rate of 0.020 T/s), determine the induced emf. (Use Faraday's law; the induced emf in a loop equals the absolute value of the time rate of change of the magnetic flux through the loop.) (b) If the total resistance of the circuit is 5.0(82), find the induced current. (c) Suppose we change the...
3. A controlled single-phase fiull-wave controlled rectifier is connected in a de motor drive in Figure 4. The de motor armature inductance can be assumed large enough such that any motor curent ripple is negligible. (a) Assuming negligible supply reactance, show that the average rectifier output voltage V, in tems of the supply ms voltage E and the firing angle a, is given by 2/2E (6 marks) cos a _ (b) Given that the supply voltage is 230V, 50HZ and...
1) Figure 1 shows an infinity long wire with current I in +x direction. A triangular loop with the each side equal L and the total resistance of R is placed initially at distance of do from the wire as shown in the figure. a) Find induced current (including the direction) if the loop is moving with constant velocity of v = voj. b) Find induced current (including the direction) if the loop is moving with constant velocity of j...
please show work when possible so that I may better
understand. Thank you.
x=L The rail gun consists of two thick conducting rails connected to a power supply and there is a magnetic field assumed to be uniform and constant in the direction shown. A short conducting bar that is to be (or carry) the projectile is placed across the bars at x -0. The current flows through the bars as shown. The magnetic force on the bar causes it...
1. Write an equation that describes voltage supplied by
a wall outlet.
(f = 60 Hz, Vrms = 120 V)
2. What is the instantaneous voltage of a sine wave at
half of a period?
Describe Alternating Current (AC). Explain how resistors, capacitors, and inductors behave in an AC circuit. WRITEUP REQUIREMENTS Informal: Questions - 6 pts, Data Tables - 3 pts, Survey Questions from Syllabus - 1 pt INTRODUCTION V Up to this point, we have been using supply...
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