Question

The force experienced by a unit mass at a point in the gravitational field is called its

• A. gravitational intensity
• B. electric intensity
• C. magnetic intensity
• D. gravitational constant

Answer 1

The correct option is A

gravitational intensity

Explanation for correct answer

Option- A

1. The force experienced by a unit mass at a point in the gravitational field is called gravitational intensity.
2. Gravitational intensity means the magnitude of gravitational force that is experienced on a unit mass.
3. So, $F_G=mg=1\times g=gNewton$
4. Also, we know that g is called gravitational intensity.

Explanation for incorrect options

Option (B)

1. The electric field is the area around an electric charge where its impact can be felt.
2. The force experienced by a unit positive charge put at a spot is the electric field intensity at that point.
3. The intensity of an electric field is a vector quantity.
4. The letter 'E' stands for it.

Option (C)

1. Magnetic intensity is defined as the ratio of the strength of the magnetizing field to the permeability of free space.
2. The strength of a magnetic field at a given location can be expressed as a vector quantity known as magnetic intensity (H).
3. Magnetic intensity is measured in $A{m}^1$.

Option (D)

1. In Newton's law of gravitation, a constant relates the force of gravitational attraction between two bodies to their masses and distance from one other.

Hence, the force experienced by a unit mass at a point in the gravitational field is called its gravitational intensity (A)