#How to test voltage with a multimeter how to

#How to test voltage with a multimeter how to

The ratio of the number of windings or ratio of the primary to the secondary EMF is called the ratio of transformation:ДЇrom the above, we can draw the most important conclusion, which will help us understand how to check the transformer multimeter. For example, if the voltage is ten times higher, the current is ten times lower than in the second one. In this case, the proportion is preserved. Simply put, since the voltage in the primary winding is higher than in the secondary one, the current in it is less than in the second one. Therefore, a smaller current flows in a high-voltage winding and vice versa. To maintain the balance of primary and secondary winding capacities, we need to reduce the current as of the voltage increases. The latter expression has a great practical interest for us, which is as follows. In the first case, it is higher, and in the second case, it is lower.ДЄlso, without giving any reasoning, we should note that the power of both windings is always equal:ДЄnd since the power is a product of current i at voltage u Accordingly, the number of windings will also be different. Their primary winding is supplied with a high voltage of 220 V (230 V in the new State Standard), and the secondary winding is removed from the low voltage: 9 V, 12 V, 24 V, etc. In most cases, we are dealing with step-down transformers. The more windings, the higher the value of EMF (or winding voltage). Without going into details, which are not necessary here, we note that the EMF and the voltage are determined by the number of windings with other equal parameters Therefore, let us consider some more useful points.ДЈ Connecting the Transformer Windings How to Test a Transformer with a Multimeter Correctly This knowledge is not yet enough to fully understand how to test a transformer with a multimeter. When the load is connected to the secondary winding, an alternating current of i2 flows in it. The magnetic field is short-circuited and amplified by the core of the magnetic wire and leads an alternating electromotive force of the EMF in the secondary winding. An alternating magnetic field is always formed around a conductor with alternating current. When an alternating voltage is applied to the primary winding, a bullet is created in the primary winding for the flow of alternating current because the electrical circuit is closed. One of the windings, called the primary winding, is energized, and the other, called the secondary winding, is removed. The core is made of thin insulated sheets of special electrical steel. Each winding is a conductor insulated from the other. The simplest transformer is two windings wound on a core or a magnetic circuit. LetвЂ™s consider it here in a simplified form. To perform further experiments and experiments more consciously, you should understand how the transformer is arranged and operates. For some experiments, we also need an incandescent bulb with a bullet. It is better to take a multimeter in your hands. Therefore, if you have a transformer with unknown parameters in your hands, do not rush to throw it away. In most linear power supplies, the transformer is the lionвЂ™s share of the cost. Such knowledge is useful for the reason that it saves time and money. It is very useful for beginner radio amateurs to know how to check the transformer with a multimeter.