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Scenario - As part of your technician training, you are required to learn how electricity is produced, and this begins with understanding magnetism and its effects.
Task 1 - Describe, with the aid of diagrams, the magnetic field produced by a permanent magnet or an electromagnet.
Task 2 -
For the graph above describe the relationship between the flux density and field strength for cast iron and one other metal shown on B/H graph. Your answer should include references to the coercive force for these materials.
Task 3 -
a. Describe the principle of electromagnetic induction.
b. Using diagrams, describe at least 2 applications of electromagnetic induction used in the real world.
Graphs must be neat and fully labelled; axis, titles, units etc. Calculations – Use headings. All calculations must show all the working out. Starting equations must be shown before transposing. Units stated in final answer to correct magnitude. Final answer must be clearly stated, properly identified and underlined.
What is the ac component of current in this generator the instant after the fault occurs? What is the total current (ac plus dc) flowing in the generator right after the fault occurs?
A cube with an edge of length 2 mm is charged to -1.2 C. Find: a)ρv , if the charge is distributed uniformly over its volume ; b) ρs , if the charge is distributed uniformly on its surface; c)ρL , if the charge is distributed uniformly on the edges o..
a) starting from an initial state of 1000list the sequence ofstates of the four flip-flops after each shift. b) Begining in the state 10...0,how many states are there inthe count sequence of an n-bit ring counter
efficiency in a power transformer is 98.6 when loaded such that its core losses equal the copper losses. calculate
The voltage across the load must remain between 4.7 and 5.0 V for all values of load current. Design a voltage-divider network to supply the load. You may assume that resistors of any value desired are available.
what is the detection gain?
Calculate the amplitude of the electric field intensity at a distance of 10 km in the plane of the loop.
The AM frequency band is centered at 1 MHz, and the bandwidth of each station is 10 kHz. - What order of magnitude do you estimate as the Q of many of the resonant circuits in AM radios?
For what values of m, n is the complete bipartite graph Km,n planar?
Show transcribed image text Four signals m1(t). m2(t). m3(t). and m4(t) are bandlimited to 3.6 kHz. 1.2 kHz. 1.2 kHz, and 1.2 kHz, respectively. These signals are to be transmitted using TDM.
Consider a series RL circuit with a voltage source. Take the output as the voltage across the resistor with L = 2 henrys and R = 4 ohms. (a) Find the zero input response as a function of time. The initial current is 2 A.
A small circular parabolic reflector, often referred to as dish, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the antenna is 1 meter, the frequency of operation is 3 GHz
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