![]() ![]() When MIG welding automotive sheet metal, thin wire is better. What size wire is best for MIG welding?Ī. When you need to increase your power, then your best bet is to use a thicker wire. If you increase your amperage too much, then the arc will become erratic and leave spatter along the weld. ![]() Thicker wires can often feed at much slower speeds. The coil is moving parallel to the direction of the magnetic field, so no potential difference is induced.MIG Welding: What Size Wire Should I Use? – YouTube Is thicker welding wire better? Here, the induced potential difference travels in the same direction as at B.Ī – The coil is at 360°, ie it is back at its starting point, having done a full rotation. The coil is moving at 90° to the direction of the magnetic field, so the induced potential difference is at its maximum. The coil is moving parallel to the direction of the magnetic field, so no potential difference is induced.ĭ – The coil is at 270°. The coil is moving at 90° to the direction of the magnetic field, so the induced potential difference is at its maximum.Ĭ – The coil is at 180°. The coil is moving parallel to the direction of the magnetic field, so no potential difference is induced.ī – The coil is at 90°. The voltage–time graph for a dynamoĪ – The coil is at 0°. The diagram shows four different positions of the coil in a dynamo, and the corresponding voltage produced. increasing the number of turns on the coil.increasing the strength of the magnetic field.The maximum potential difference or current can be increased by: The graph shows a sine curve that stays in the same direction all the time. The output of a dynamo can be shown on a voltage–time graph. This means that the current to the external circuit always flows in the same direction. ![]() As the induced potential difference is about to change direction, the connections are reversed. In a dynamo, a split ring commutator changes the coil connections every half turn. The dynamo In a bike dynamo, the magnet rotates inside a fixed coil of wire ![]() Some bike lights use a type of dc generator called a dynamo to run the lamps while the wheels are turning. However, it uses a split ring commutator rather than the two slip rings found in alternating current (ac) generators. A simple dc generator consists of a coil of wire rotating in a magnetic field. A direct current (dc) generator is another device that produces a potential difference. ![]()
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