Question

The resistance of an ideal ammeter is

• A. Infinite
• B. Very High
• C. Small
• D. Zero

Answer 1

The Correct Option is D

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Answer 2

An ammeter can measure a broad range of current values because, at high levels, only a tiny amount of the current is routed via the metre mechanism; the majority is carried by a shunt connected in parallel with the metre. The resistance and inductive reactance of an ammeter must be extremely low.
Ammeters have very low resistance because the voltage drop across the ammeter must be small. In order to meet the following parameters, the ammeter must be linked in series. An ideal ammeter has no resistance. A 'clamp-on' ammeter (an electrical metre with an incorporated AC current clamp, also known as a clamp metre, clamp-on ammeter) monitors current using a wire.
It is an excellent ammeter because it monitors the intensity of the magnetic field surrounding it rather than being part of the circuit.   Converting an ammeter to an ideal ammeter is a straightforward operation. We merely connect the shunt in parallel with the ammeter in this step. The shunt is nothing more than an extremely low-resistance resistor.

Answer 3

An ammeter, also known as an ampere meter, is a measuring device used to measure current in a circuit in amperes. Micro-ammeters and milli-ammeters are ammeters used to measure current in smaller units. Moving coil, electro-dynamic, digital, and other types of ammeters are utilized. In the circuit, they are all linked in series. If an ammeter has a significant amount of resistance, it will raise the equivalent resistance of the circuit, resulting in less current flowing.
As a result, we will encounter measurement inaccuracies. However, if the resistance is kept low from the start, the ammeter will have less of an influence on the equivalent resistance of the circuit, resulting in less measurement inaccuracy. An ideal ammeter is one whose resistance is zero, resulting in zero measuring error for the user. There is practically no such conductor with zero resistance. However, ammeters have very low resistances, resulting in very low errors that can be inconsequential.