Using an Ammeter to Measure Current


 
 
Concept Explanation
 

Using an Ammeter to Measure Current

The electric current in a circuit is measured by an instrument called the ammeter. The ammeter has a needle moving over a graduated scale. It gives the value of current flowing through it. Ammeter has two terminals marked +ve and -ve. The terminal marked +ve is connected to the higher potential side of the circuit with a wire, while the -ve terminal is connected to lower potential side of the circuit.

To measure the current through an element of a circuit, an ammeter is connected in such a way that the current flowing through the element. Such a connection is called a series connection. In Figure below the current is flowing through the lamp also flows through the ammeter. The reading of the ammeter gives the current through the lamp. Note that if the ammeter is removed, there will be a gap, and the current through the circuit will stop.

Two or more electric elements are said to be connected in series if the current flowing through one also flows through the rest. An ammeter is always connected in series in a circuit.

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Sample Questions
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Question : 1

The function of shunt in an ammeter is to ____________________.

  

Right Option : B
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Question : 2

An ammeter is a device that is used to measure the _____________ in the circuit

Right Option : B
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Explanation
Question : 3

Ammeter is used to measure ___________

Right Option : B
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Explanation
 
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