What is the advantage of resistance?
Connection of resistance reduces current and protects the instruments from getting high currents. Resistance also increases battery life as less current is drawn. Also, there are many disadvantages like power is wasted. Resistance carrying electric current generates heat energy, which is used for useful purposes.
What are the disadvantages of resistance?
Whether a resistance is in series or parallel, in a properly designed circuit the resistor is there for a very good reason. It makes the circuit work as intended. The only time it is a disadvantage is if this is an unintended resistance – as of a wire. It will cause a voltage drop and loss of power.
What are the advantages of air resistance?
There is one main advantage to reducing air resistance on a car. The advantage is that this reduces the amount of drag on the car, thereby reducing the amount of fuel that is needed to drive the car at any particular speed and for any particular distance.
What are the advantages of resistance welding?
Advantages of Resistance Welding
- Ability to weld .010”-.125 thick materials.
- High welding speed.
- Automated.
- Similar and dissimilar metals are capable of being welded.
- High production rate.
- Environment-friendly process.
- No need for filler metal, flux, and shielding gases.
What is the biggest advantage of resistance welding?
Resistance welding is the joining of metals by applying pressure and passing current for a length of time through the metal area which is to be joined. The key advantage of resistance welding is that no other materials are needed to create the bond, which makes this process extremely cost effective.
What is the main drawback of resistance welding?
Disadvantages and defects of resistance welding Higher cost, a large investment costs. 2) large capacity, and the majority of single-phase welder, unbalanced load on the grid causing serious, must be connected to the grid larger capacity.
What are the advantages and disadvantages of resistance welding?
Advantages & Disadvantages of Resistance Welding
- Higher speeds, <.1 seconds for automotive spot welding, short process time.
- Excellent for sheet metal applications <1/4 inch.
- No filler metals or consumables required.
- Relatively safe due to low voltage requirements.
- Environmentally friendly clean process.
What is the principle of resistance?
Resistance generates friction heat when force is applied. Resistance welding utilizes this heat. Similarly, when an electric current tries to move forward through two metals, heat is generated due to the resistance of the metal itself and the friction at the contact point.
What are the main factors to be considered in resistance welding?
Resistance welding needs three (3) basic parameters to produce constant welds:
- a constant pressure of the electrodes on the material to be welded,
- a constant electrical current during the welding process,
- a constant welding time.
What is the principle of resistance spot welding?
Resistance spot welding is a fairly simple heat generation process: the passage of current through a resistance generates heat. This is the same principle used in the operation of heating coils. In addition to the bulk resistances, the contact resistances also play a major role.
What are the three main function of electrode in resistance welding?
The most significant is its high electrical conductivity, requiring high welding currents and large capacity equipment. Secondly, the electrodes are made from copper which alloys with aluminium, resulting in rapid wear and a short electrode life.