Understanding Ammeter Working

Click on the flashcard to see the answer

What is the primary function of an ammeter?

An ammeter measures the electric current in a circuit.

How is an ammeter connected in a circuit?

An ammeter is connected in series with the circuit.

Why does an ammeter have low resistance?

Low resistance minimizes the voltage drop across the ammeter, ensuring accurate current measurements.

What could happen if an ammeter is connected in parallel?

Connecting an ammeter in parallel can cause it to short circuit or get damaged.

What are the typical types of ammeters used?

The typical types are analog ammeters and digital ammeters.

What is the principle behind a moving coil ammeter?

It operates on the principle of the magnetic effect of current.

Why is regular calibration important for an ammeter?

Calibration ensures the ammeter provides accurate and reliable measurements.

How does temperature affect ammeter readings?

Temperature changes can cause resistance variations, affecting accuracy.

What are shunts in ammeters used for?

Shunts are used to allow high current to bypass the meter, protecting it.

What is a zero-center ammeter?

A zero-center ammeter measures current flow in both directions from a central zero point.

What safety precautions should be taken while using an ammeter?

Ensure correct connection (in series), observe polarity, and choose the correct range.

Why shouldn't an ammeter be directly connected to a power supply?

Direct connection can cause excessive current, damaging the ammeter.

Can ammeters measure AC current?

Yes, certain designs like clamp meters are used to measure AC current.

What effect does a faulty ammeter have on a circuit?

A faulty ammeter may lead to incorrect current readings, potentially impacting circuit function.

How does a digital ammeter differ from an analog ammeter?

Digital ammeters provide electronic readings on a display, while analog ammeters indicate current with a needle and dial.

Understand Better