what is the resistance of an ideal ammeter?
Answers
Answer:
zero resistance
Explanation:
An ideal ammeter has zero resistance. A “clamp-on” ammeter measures current through a wire by measuring the strength of the magnetic field around it rather than by becoming part of the circuit, making it an ideal ammeter.
Answer:
The operating principle for this ammeter is identical to the clamp-on style of meter: the circular magnetic field surrounding a current-carrying conductor deflects the meter’s needle, producing an indication on the scale. Note how there are two current scales on this particular meter: +/- 75 amps and +/- 400 amps.
These two measurement scales correspond to the two sets of notches on the back of the meter. Depending on which set of notches the current-carrying conductor is laid in, a given strength of magnetic field will have a different amount of effect on the needle. In effect, the two different positions of the conductor relative to the movement act as two different range resistors in a direct-connection style of ammeter.
REVIEW:
An ideal ammeter has zero resistance.
A “clamp-on” ammeter measures current through a wire by measuring the strength of the magnetic field around it rather than by becoming part of the circuit, making it an ideal ammeter.
Clamp-on meters make for quick and safe current measurements, because there is no conductive contact between the meter and the circuit.