What is Resistance: Definition and 1000 Discussions

The French Resistance (French: La Résistance) was a collection of French movements that fought against the Nazi German occupation of France and the collaborationist Vichy régime during the Second World War. Resistance cells were small groups of armed men and women (called the Maquis in rural areas) who, in addition to their guerrilla warfare activities, were also publishers of underground newspapers, providers of first-hand intelligence information, and maintainers of escape networks that helped Allied soldiers and airmen trapped behind enemy lines. The Resistance's men and women came from all economic levels and political leanings of French society, including émigrés, academics, students, aristocrats, conservative Roman Catholics (including priests and nuns), Protestants, Jews, Muslims, liberals, anarchists, and communists.
The French Resistance played a significant role in facilitating the Allies' rapid advance through France following the invasion of Normandy on 6 June 1944. The French Resistance provided military intelligence on the German defences known as the Atlantic Wall and on Wehrmacht deployments and orders of battle for the lesser-known invasion of Provence on 15 August. The Resistance also planned, coordinated, and executed sabotage acts on the Nazi electrical power grid, transport facilities, and telecommunications networks. The Resistance's work was politically and morally important to France both during the German occupation and decades that followed. It provided the country with an inspiring example of the patriotic fulfilment of a national imperative countering an existential threat to French nationhood. The actions of the Resistance stood in marked contrast to the collaborationism of the Vichy régime.After the Allied landings in Normandy and Provence, the paramilitary components of the Resistance were organized more formally, into a hierarchy of operational units known, collectively, as the French Forces of the Interior (FFI). Estimated at 100,000 fighters in June 1944, the FFI grew rapidly and reached approximately 400,000 by October. Although the amalgamation of the FFI was, in some cases, fraught with political difficulties, it was ultimately successful, and it allowed France to rebuild the fourth-largest army in the European theatre (1.2 million men) by VE Day in May 1945.

View More On Wikipedia.org
  1. annin

    Fundamental electrokinetics problem calculation using Ohm's Law

    For a consumer with a resistance of 2 ohms, it has an internal resistance of 0.3 ohms and a voltage of 130 Vwe switch on the power source. The resistance of each connecting thread is 0.15 ohms. What is the voltage drop on the line and what is the terminal voltage?
  2. Z

    Two concentric conducting spherical shells and resistor in between

    The first thing I thought about was the relationship ##\vec{J}=\frac{\vec{E}}{\rho_r}## which is a statement of Ohm's law. That is, current density is proportional to electric field and the constant of proportionality is the reciprocal of resistivity ##\rho_r##, which is the same as...
  3. M

    What factors determine the resistance and inductance in a coil?

    Hi what factors determine the resistance and inductance in a coil and they related i.e. if the resistance is high would the inductance be high ? Additionally, would the resistance and inductance value change over time? I only ask this as we tested the resistance and inductance on our coils...
  4. S

    Calculate the resistance to add in parallel to balance this bridge circuit

    The reading on the voltmeter is 0. I figure the potential drop through line AB must be the same as the potential drop through AC (since voltmeter is zero). As such, the 10 Ohm resistor has the same as the effective resistance of the parallel branch. 1/10 = 1/8 + 1/R 1/R = -0.025 R = -40 Ohms...
  5. Sibilo

    I Does the Skin Effect cause charge to accumulate on the surface of a conductor?

    good morning gentlemen, I would like to ask you a fairly simple question but which I am unable to resolve. Then considering the "skin effect", which involves an increase in resistance to the passage of current with consequent generation of eddy currents, this leads to an accumulation of charges...
  6. S

    A few questions about airflow and filters...

    Just a few quick questions regarding airflow, mostly in connection with motors creating the airflow, like pc fans, vacuum motor, air going into a car engine through air filter, etc. 1) Adding more filters increases the availably surface through which the air can flow, therefor reducing the...
  7. S

    Minimum resistance to prevent overheating in AC circuit

    My calculation: ##400=\left(\frac{9.9}{\sqrt{2}}\right)^2 R## and I got R = 8.2 ohm But the answer key used Io (9.9 A) instead of Irms Why? Thanks
  8. L

    Calculate Max Resistance for 2 Parallel Wires

    Hi, I am not sure if I have calculated the task here correctly: Based on the drawing, I now assumed that the two resistors are connected in parallel. The total resistance can then be calculated as follows ##\frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2}##. Since the two wires are made of the same...
  9. R

    Possible to change a thermistor resistance curve?

    Currently when set to 1C, the fridge cools to and maintains 4-5C(As a conversion when set to 34f it cools and maintains approx. 40f. ), all functions like fan/defrost are working correctly. Potentially the main board has an issue but all other zones are working correctly so I would prefer to not...
  10. Lotto

    Can I find a general solution to this circuit?

    TL;DR Summary: I have to find an equivalent resistance of the circuit below, dependent on the amount of ##R_3## - resistors. Here is the circuit: I think there is no general solution. When I want to calculate it, I have to do...
  11. T

    B Understanding air flow and resistance

    In a recent thread, I thought I understood what was going on but alas, I am still confused. So I offer this diagram and ask for more help please. Shown is an aircraft holding pattern. The one on the left is flown in still air. The one on the right is flown with a wind coming from the...
  12. C

    Calculating Copper Wire Gauge for Resistance Thermometer Bridge Circuit

    a. The resistance thermometer bridge circuit shown in FIGURE 1 has a designed maximum temperature of 200°C, ignoring the effects of connecting wire resistance. If the connecting loop is 250 m determine the smallest gauge (swg) of copper wire which must be used if the indicated maximum...
  13. MatinSAR

    Current in a circuit without external resistance

    It shows 0 and it's obvious why. I have another question. Can I say that in this circuit the current is maximum and it equals to ##\frac ε r = 2A##?! Someone asked me this question: Are A and B two ends of the wire? If yes, Why is there current in the wire even though the potential difference...
  14. P

    I Measuring Low Resistance: Why Meter Bridge is the Preferred Choice

    Why meter bridge is chosen over post office box to measure low resistance?
  15. J

    Lithium Charging Load Resistance?

    I'm trying to understand the load-resistance of an A123 Nanophosphate High Power Lithium Ion cell. https://www.buya123products.com/uploads/vipcase/844c1bd8bdd1190ebb364d572bc1e6e7.pdf My understanding is that resistance increases as the cell charges. The datasheet says "Internal Impedance...
  16. J

    How does the presence of a cube resistor affect current flow in a circuit?

    I would think that it is 2 A (6/3 because there are three wires the current can go to), but this does not seem to be correct.
  17. Retcon_1

    Engineering Finding the Armature Resistance from winding/coil resistance

    I'm struggling to find the exact way to do this and think that I am overthinking the equation, all of my lesson notes tend to explain how to find the armature resistance using the back e.m.f and the armature current, we can figure out the armature current but do not have enough information to...
  18. S

    Adjustment of Variable Resistance in an automobile battery

    How is the load (variable resistance) adjusted in an automobile battery? Mechanically (potentiometer, rheostat) or electronically (digital potentiometer) or are both configurations possible.Can the load in a automobile battery be a three terminal divider (potentiometer) or is it almost always...
  19. T

    Coefficient of rolling resistance

    Hi, What is the formula or methodology for finding the Crr? There are many of those tests done on the internet, but none state the procedure of calculation. I'm trying to find the correlation between tire pressure and distance and want to use Crr as one of the key factors influencing it. Maybe...
  20. abdulbadii

    I How to do resistance (spot) welds by using arc/TIG welder?

    How do we correctly do resistance ie. spot weld by use of arc or TIG welder (if the difference is big explain each of this weld separately) to join piled up two bolt rings of the same thickness 2-2.5 mm and center diameters but largely different outer diameters
  21. S

    I Deriving expression for resistance in terms of current density

    Is there a way to obtain equation 9.42 (I is current, j is current density, and sigma is conductivity) in the following image (from Modern Electrodynamics by Andrew Zangwill, the part on electromotive force) besides using V=IR and substituting the line integral of j/conductivity for V? The...
  22. Some1WhoNeedsHelp

    Need Help to Understand an Equation for Air Resistance

    I don't understand what the gamma letter in the equation is supposed to represent.
  23. homeworkhelpls

    I Why is resistivity inversely proportional to resistance for NTC semiconductors?

    Why is resistivity inversely proportional to resistance for NTC semiconductors?
  24. T

    Initial Position Discrepancy Involving Fluid Resistance

    Good evening, I have a question on the problem I've provided in the homework statement. Essentially, the problem is asking us to compare the maximum height and time to max-height between a simple projectile motion case vs. a case using fluid resistance proportional to v. I've solved everything...
  25. kma

    Resistance of wet sponge with voltage

    hi, in recent science projects I have been studying the effect of water on electrical resistance of materials that absorb water such as wood and sponge (the reason for the majority of my weird questions regarding water and electricity). I am calculating resistance by reading the current going...
  26. T

    I What is the difference between the resistance force and the friction coefficient?

    Hi I have been wondering what is the difference between resistance force and friction coefficient. While doing research online I could not find a clear answer. Maybe someone here will now:bow:
  27. kma

    I What happens to resistance of tap water as voltage is increased?

    1 In recent days I have done a few experiments measuring the current of water as it goes up from 9 volts up to 36 volts, and following Ohms law to convert it to resistance. And I discovered a very interesting trend. In between 9 and 18 volts, there is a massive drop in resistance (by around a...
  28. A

    Resistance of this circuit containing a Circular section

    I understand that the two separate parts make 2/3, but where is 1/12 ohm coming from?
  29. K

    Java A little question about Javascript Resistance Caculator

    Javascript Resistance Calculator The values of the resistor are calculated from the colour of the bands. The values of the colours are shown in Table 1. The first band is the tens values. The second band gives the units, the third band is a multiplying factor the factor being 10band value. The...
  30. A

    Engineering Small Signal Input Resistance of a BJT amplifier

    The diagram of the BJT amplifier small signal model is below. This is not really a homework question as I am self-learning electronics, but I was advised it may be better placed here than in the technical portion of the forum. Thus I do not have an "attempt" at a solution (which is given as RI...
  31. neilparker62

    B Troubleshooting Battery Internal Resistance Measurements

    Have been busy working with a student doing a Physics prac to determine the internal resistance of an AA 1.5 V (nominal) battery. The basic formula being investigated is: $$Vt=E_{cell}−Ir_i$$ where ##Vt## is the load (resistive only) voltage, ##E_{cell}## is the emf of the AA battery, ##I## is...
  32. C

    Can't find total resistance in a complex star circuit

    [Thread moved from the technical forums to the schoolwork forums by the Mentors] Hi i have this assignment for homework: There is only one battery for the circuit, E=10V, R=4 Ohms and L=1H it asks me to find the time constant of the circuit. i know that a time constant in a RL circuit is t=L/R...
  33. X

    Launching a Projectile with Air Resistance

    Mentor note: Moved from a technical forum section, so Homework Template is not present. Hello Physics Forums members, I am a student in AP Physics C and I was just working out the range of a projectile when air resistance is non-negligible. As of right now I'm going to use the linear model of...
  34. kalm1307

    Resistor value given capacitance and EMF with a resistance R after 3ms

    T=R/C So: 0.003s=R/100μC R=3*10^-7Ω I am really confused with the equations I have to use
  35. Joshy

    Engineering Equivalent resistance of an envelope peak detector (RF CMOS)

    Full problem: I don't normally think about circuits like these in terms of energy (Joules) so I was very much confused. What I did was find where the simplified expressions intercepts with each other to get the voltage. I scanned in my work although this text is a walk through of what I did...
  36. jaumzaum

    Understanding Increase in Peripheral Resistance & Blood Pressure

    Hello guys, can anyone help me to understand why an increase in peripheral resistance causes an increase in the blood pressure? If we assume the equation Delta P = R times Q If we assume Q is constant, the greater the resistance the greater the the decrease in pressure, so the pressure should...
  37. r4g3r4hk

    B Does air resistance have a max value?

    I know that friction on a surface has a maximum value. When an object is pushed with a force greater than the maximum friction value, the object will move. But when a free-falling object falls from a height, does air resistance have a maximum value as well?
  38. T

    Resistance of a half ring of a given resistivity

    Lets suppose a half ring whit internal radius a and external radius b and height t. We can calculate the resistance of the half ring considering that it is made of a number of parallel resistors each one with resistance given by: R = ρ L/S where L = π·r and S = t·dr. The resistance of each...
  39. J

    Find the resistance of electrons in nanoshells

    We are given the resistivity of Gold. The length will be the outer radius minus the inner radius. We need to find the area. But I'm not sure how that would work given the spherical nature of the particle Would we need to use an integral to add up the increasing cross sectional area from the...
  40. A

    I History behind Ohm's law

    Voltage SI unit = Volts Current SI unit = Ampere Resistance SI unit = Ohm Ohm's law : V=IR Did Georg Ohm (German), Ampere (French) & Volta (Italian) collaborated when Ohm came out with this electricity equation with units for voltage, current & resistance as per their surnames? Credit goes to...
Back
Top