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What physical quantity corresponds to the rate of flow of charge?
Electric current
How is current fundamental physical quantity when current is equal to charge per unit time?
The unit is the Ampere, equivalent to 1 coulomb of charge per second.
Is current a vector or a scalar?
Definitely current is a SCALAR. Current density, of course, is a vector quantity Current = charge / time Both charge and time are scalars Current density = current / area Here area is a vector quantity Hence scalar product of current density and area give scalar quantity i.e. current. So electric current is a scalar Of course we assign +ve and -ve sign to currents. It is not because of direction as we do incase of vectors. But it is only algebraic sign.
What is the principle of ballistic galvanometer?
when current passes through a coil of b.g then it rotates in a magnetic field and measures the quantity of charge rather than current
Why current is not derived quantity?
That's because that's the way the scientists who created the SI defined it to be. In the relationship: charge = current x time It is possible to derive any of the three quantities from the other two (the other two would then have to be defined as base quantities). The reason it was defined this way is probably because it was found to be easier to measure a current accurately, than to measre a charge.
Why current a fundamental quantity though it is flow of charge per unit time?
Ampere = Coloumb / second is the same as saying that Coloumb = Ampere x second. Any of the two electrical units can be derived from the other one. Ampere is NOT a "fundamental quantity"; it is an SI base unit. The base units are not necessarily those that are somehow considered more "fundamental" than others; instead, the base units are those that can be measured with a great accuracy. In the case of current vs. charge, it seems that measuring a current can be done with greater accuracy than measuring a charge directly; therefore, the current is the base unit, and the current is derived. However, this doesn't make current any more "fundamental" than charge.
What physical quantity corresponds to the rate of flow of charge?
Electric current
Why is charge not a fundamental quantity?
Because the measurement of current is more convenient.we may take direct reading of current.
How is current fundamental physical quantity when current is equal to charge per unit time?
The unit is the Ampere, equivalent to 1 coulomb of charge per second.
Is current a vector or a scalar?
Definitely current is a SCALAR. Current density, of course, is a vector quantity Current = charge / time Both charge and time are scalars Current density = current / area Here area is a vector quantity Hence scalar product of current density and area give scalar quantity i.e. current. So electric current is a scalar Of course we assign +ve and -ve sign to currents. It is not because of direction as we do incase of vectors. But it is only algebraic sign.
What is the difference between electric currents and electric charge?
Electric current is a flow of electrons is a measure of the quantity of electrical charge passing any point of the wire in a unit time.And, electric current is measured in ampere (A).Whereas, electric charge is the quantity of electricity that flows in electric currents . And , it is measured in coulomb (C)
What is the charge formula?
An electric charge is a physical quantity of matter that causes it to experience a force when placed near an electromagnetic field. Its formula is given as: charge = current x time.
What is the formula for charge?
An electric charge is a physical quantity of matter that causes it to experience a force when placed near an electromagnetic field. Its formula is given as: charge = current x time.
What is the principle of ballistic galvanometer?
when current passes through a coil of b.g then it rotates in a magnetic field and measures the quantity of charge rather than current
Why current is not derived quantity?
That's because that's the way the scientists who created the SI defined it to be. In the relationship: charge = current x time It is possible to derive any of the three quantities from the other two (the other two would then have to be defined as base quantities). The reason it was defined this way is probably because it was found to be easier to measure a current accurately, than to measre a charge.
Why is electric current a scalar quantity?
For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough. The quantity should obey the laws of vector addition too. Like the triangle law or the parallelogram law. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.Sometimes, treating a current like a vector makes sense, like when the current though a conductor induces a magnetic field.
What is the SI unit of electric charge?
That's the coulomb, equal to the quantity of charge moved by a current of 1 ampere during an interval of 1 second.
