What is load line: Definition and 15 Discussions

The waterline is the line where the hull of a ship meets the surface of the water. Specifically, it is also the name of a special marking, also known as an international load line, Plimsoll line and water line (positioned amidships), that indicates the draft of the ship and the legal limit to which a ship may be loaded for specific water types and temperatures in order to safely maintain buoyancy, particularly with regard to the hazard of waves that may arise. Varying water temperatures will affect a ship's draft, because warm water is less dense than cold water, providing less buoyancy. In the same way, fresh water is less dense than salinated or seawater with a similar lessening effect upon buoyancy.
For vessels with displacement hulls, the hull speed is defined by, among other things, the waterline length. In a sailing boat, the waterline length can change significantly as the boat heels, and can dynamically affect the speed of the boat.
A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines plans.
In aircraft design, the term "waterline" refers to the vertical location of items on the aircraft. This is (normally) the Z axis of an X × Y × Z coordinate system, the other two axes being the fuselage station (X) and buttock line (Y).

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  1. ARoyC

    Engineering Optimizing Diode Performance: Load Line Analysis

    I have drawn the I-V characteristic graph of the diode. I am facing problems with drawing the load line. For what value of E (Source Voltage), should I draw the Load Line? To get the I-V graph, I had to continuously change E.
  2. N

    Transistor Load line doesn't intersect characteristic curves....

    Hello, I've carried out an experiment to plot the characteristic curves (Ic vs Vce) for a BC108 transistor and then attempted to find where the load-line intersects those curves. Below are my results: ...as you can see, the load-line doesn't intersect the characteristic curves at all...
  3. Pushoam

    I Understanding DC Load Line and its Relationship with VCE & IC

    I didn't understand the following: The relationship between ##V_{CE} ## and ##I_C## is linear. In active region, even if the ##V_{CE}## increases, ##I_C## remains almost same for a given ##I_B##. So, how can the relation between the two can be linear? Can anyone tell me the utility of the...
  4. F

    Load line analysis in femm4.2

    Dear Forumers, This question is about load-line analysis for loudspeaker driver magnetic circuits in FEMM 4.2 (Finite Element Method for Magnetics), I can't seem to get an answer from the mailing lists. I would like to get the permeance coefficient for random points inside the magnet. I have...
  5. D

    How do I plot the load line for a nonlinear network with an ideal diode?

    Homework Statement Plot the iA vs. vA characteristics for the nonlinear network shown in Figure 4.49. Assume the diode is ideal. The nonlinear network from part (a) is connected as shown in Figure 4.50. Draw the load line on your v i characteristics from part (a), and find iT Homework...
  6. thankz

    Can you do load line analysis on a bjt with just a knowlege-

    can you do load line analysis on a bjt with just a knowledge of algebra or is calculus required?
  7. ranju

    Drawing the DC Load Line: Exploring Saturation and Cutoff Points

    while drawing the dc load line , , we take VCE = 0 and mark it as saturation point but but in saturation state VCE is very small but not zero..! I actually want to make clear that whether its a fact or is it just an assumption to find out saturation point..?? similarly for the cutoff point we...
  8. N

    Finding current and voltage amplification via load line graph plotting

    Homework Statement This is a question refer to a transistor in a common emitter configuration. And this is the table with data of Vce and Ic at certain range of Ib stored in microsoft excel, and the graph is plotted within the file attached(in another tab)...
  9. O

    What Determines the Load Line of a Transistor?

    The load line of transistor depends on resistor of base or resistor of collector ? Or both? thank
  10. R

    What is the load line equation for I-V Characteristic plot?

    What is the load line equation for I-V Characteristic plots? Why is load line slope negative? According to Ohm's Law: i = V/R; so as voltage increases current increases then slope should be positive, right?
  11. O

    Load line of transistor question

    In order to draw the load line of transistor, we have to find out the saturation current (where the voltage is minimum or zero) and voltage of collector-base when collector current is zero. In order to calculate maximum saturation current, we have to forward biased the base-emitter, and...
  12. A

    Dc equivalent circuit and dc load line analysis?

    what is meant by dc equivalent circuit and dc load line analysis? why we require these two ? advanced thanks.
  13. O

    How Do You Analyze DC/AC Load Lines and Gain in Transistors?

    Homework Statement collector emitter voltage collector current VCE V IB=100μA IB=200μA IB=300μA 400μA 500μA 0 0 0 0 0 0 1 3 7...
  14. E

    Finding an NMOS Operating Point Using Load Line

    How would I go abou finding an operating of of an NMOS? I have no idea, except that I was told I need to use something with load line. Can someone help me?
  15. P

    Understanding the Load Line Concept in Electronics: Explained

    Hey everyone, I need some help here... My question is: When a variable load is applied to a real source , explain the concept of a load line?? This is the load line in electronics...can someone please help me out with it...i can't seem to find a decent link on this topic... Any help...