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Question-1. What is electric current ? Define electric current.
Answer-1: Electric current is define as the amount of charge flowing across an area held normal to the direction of flow of charge per unit time.
Question-2. What constitutes an electric current ?
Answer-2: Charges in motion constitutes an electric current.
Question-3. What is the SI unit of electric current?
Answer-3: The SI unit of current is ampere (A).
Question-4. Is electric current a vector or scalar quantity?
Answer-4: Electric current is a scalar quantity.
Question-5. What does the direction of electric current signify in an electric circuit?
Answer-5: The direction of conventional current in an electric circuit tells the direction of flow of positive charges in that circuit.
Question-6. What do you mean by steady current?
Answer-6: A current whose magnitude does not change with time is called steady current.
Question-7. What do you mean by varying current?
Answer-7: A current whose magnitude changes with time is called varying current.
Question-8. Define the unit of electric current. Write the relation between coulomb and ampere.
Answer-8: If one coulomb of charge crosses an area normally in one second, then the current through that area is one ampere.
i.e. 1 ampere = 1 coulomb / 1 second or 1 A = 1C s-1
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