how is a ammeter connected in a circuit

how is a ammeter connected in a circuit ? In an electrical circuit, the meter is used to measure the electrical current of any circuit element, denying the ammeter. The ammeter is connected to the circuit element, because the purpose is to measure the circuit of the element. Therefore it is imperative to disconnect the connections between the circuit elements to connect the ammeter to a circuit. For example, in the picture below, an ammeter is connected to the circuit to measure the current passing through a resistor.

One end of the ammeter connected to the end of the resistor, the wire was severed with the resistor, the other end of the ammeter is connected to the wires battery.

The resistance of an ideal ammeter is assumed to be zero. An ideal ammeter is not really there, so we say the resistance is very small. And why does the ammeter have to be too small to measure the current?

The resistance shown in the picture above changes the resistance of the circuit, which is connected to the series. Because the ammeter also has a resistance and the resistance to the circuit series is connected to an equivalent resistance. We know how to determine the equivalent resistance of series-dependent resistors:

R_{es} = R + R_{ammeter}Res​=R+Rammeter

If you do not change the resistance of the circuit, so we want to be able to obtain the correct measurement, the ammeter = 0 ω, This is the resistance of the ideal ammeter. Because the resistance is very small in the actual ammeter, the resistance of the ammeter in the circuit analysis is considered to be zero.

What if we connect the ammeter in parallel to the resistance? In the picture below we connect the ammeter parallel to the same resistance in the same circuit.

When connected to the resistance, we see that the ammeter measures 37313.91. This is a very high current value. We also see that the battery is too hot and ignited. What's going on?

What is a short circuit?

First, we need to understand what the short circuit is. The following illustration shows what happens when we connect the ends of a battery with wires that do not resist resistance (in fact the resistance is too small to care, because only the resistance of the ideal wires is zero).

Since the resistance of the wire is too small, the circuit is undergoing a very large current. We can calculate the magnitude of the current using the Ohm law.

Note: This page has been translated. Could be a word error. Please consult your specialist




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