Question

Name the device used for measuring electric current. How is it connected in a circuit ?

Hint:

Contrast this with a Voltmeter, which has very high resistance and is always connected in parallel.

Answer 1

Device Used to Measure Electric Current:

The device used for measuring electric current is called an Ammeter.

What is an Ammeter?
An ammeter is an electrical instrument that measures the amount of electric current flowing through a circuit. The unit of current measured by an ammeter is ampere (A).

How is an Ammeter Connected in a Circuit?
An ammeter is always connected in series with the circuit component whose current is to be measured.

Reason:
– In a series connection, the same current flows through all components.
– Since an ammeter measures current, it must allow the entire current of the circuit to pass through it.
– An ammeter has very low resistance so that it does not change the value of current in the circuit.

Important Points:
– The positive terminal of the ammeter is connected to the positive terminal of the battery.
– The negative terminal is connected toward the negative side of the circuit.
– It should never be connected in parallel, as this may damage the instrument.

Conclusion:
The device used to measure electric current is an ammeter, and it is connected in series in the circuit so that the same current flows through it.