Question

II Short Answer Questions
1. Why current is a scalar?
2. Define current density.
3. Distinguish between drift velocity and
mobility.
UNIT 2 CURRENT ELECTRICITY 119​

Answer 1

Answer:

1. Why current is a scalar?

electric current is a scalar quantity in a case of electric current, when two currents meet at a junction, the result current of these will be an algebraic sum and not the vector sum.

therefore, an electric current is a scalar quantity although possesses magnitude and direction.

Answer 2

Answer:

2. the amount of electric current flowing per unit cross-sectional areas offer material.

3. drift velocity is defined as a average velocity with which free electrons get drifted towards the positive end of a conductor under the influence of the the external electric field . mobility is defined as magnitude of drift velocity per unit electric field.

1. in the case of electric current, when to current meet at a Junction, the resultant current of these will be an algebraic sum and not the vector sum . therefore an electric current is a scalar quantity allthough it possesses magnitude and direction.

Explanation:

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