Current density is:
Current density is a vector quantity. It represents the amount of electric current flowing through a unit area of a conductor. The direction of the current density vector is the same as the direction of the flow of positive charges. It has both magnitude and direction, which are key characteristics of vector quantities. The SI unit of current density is amperes per square meter (A/m²).
Thus, the correct answer is (b) A vector quantity.
The kinetic energy of an object is derived using which of the following equations of motion?
A ball of mass 50 grams is moving with a velocity of 15 m/s. What is its kinetic energy?
The dimension of resistance is _____.
_____ arise from the errors due to imperfect design or calibration of the measuring instrument, zero error in the instrument, etc.
The smallest value that can be measured by the measuring instrument is called
‘P’ of a body is defined as product of mass and velocity. What is P here?
Kepler’s law of areas, relates to
In Newton’s third law of motion the force acting on two bodies is _____.
Which law states that ‘Every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.’?
