MCQ Detailed View

Electric current is defined as the flow of electric charge through a conductor over time. The amount of current in a circuit is determined by how many charges pass through a specific point in the conductor per second. In the International System of Units (SI), the standard unit for measuring electric current is the Ampere (A).

One Ampere represents the flow of one Coulomb of electric charge per second through a conductor. Mathematically,

$$1A=1C/s$$

where C (Coulomb) is the SI unit of electric charge. This definition highlights the relationship between electric charge and current.The Ampere is one of the seven base SI units, making it fundamental to the study of physics and electrical engineering. It is named after André-Marie Ampère, a French physicist who made pioneering contributions to electromagnetism.

The other options given are related to electricity but are not the SI unit of current:

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  Coulomb: Measures electric charge, not current.

  
  


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  Volt: Measures electric potential difference or electromotive force.

  
  


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  Watt: Measures power, the rate of energy transfer.

  
  

Electric current can be measured using devices like an ammeter, which is connected in series with the circuit to record the flow in Amperes. Understanding this unit is crucial for analyzing electrical circuits, designing electronics, and ensuring safe power distribution.

In summary, Ampere (A) is the globally recognized SI unit of electric current. It serves as a fundamental concept in Physics, forming the basis of many electrical laws and equations, including Ohm’s Law and Kirchhoff’s Current Law.