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MDCAT
Physics
2021

Physics · Electrostatics

Work through this past-paper style MCQ, then read the full explanation. Practice more physics questions on mMCQ with adaptive practice and topic analytics.

Question

The negative of the potential gradient is equal to:

Options
  • A

    Electric field intensity

  • B

    Electric flux

  • C

    Magnetic intensity

  • D

    Magnetic flux

Explanation

W = Fd

F = qE

W = qEd

W/q = V = Ed

V/d = E

The potential gradient is represented by -Δd/Δr. So, the potential gradient may be defined as the rate of change of electric potential with respect to position. 

Mathematically, E = -Δd/Δr 

Here, E is the electric field intensity. Hence, option A is the correct option.

The potential gradient is represented by -Δd/Δr. 

So, the potential gradient may be defined as the rate of change of electric potential with respect to position.

Mathematically,

E = -Δd/Δr

Here, E is electric field intensity. Hence, option A is the correct option

Electric flux is the measure of the electric field passing through a given area. It is given by the dot product of the electric field vector (E) and the area vector (A) integrated over the area. It is represented as Φe = ∫E · dA. The negative of the potential gradient is not related to electric flux.

Magnetic intensity (H) is a term used in magnetism and is defined in the context of magnetic materials. It is the magnetic field strength that is generated by a magnetic source (e.g., a magnet or a current-carrying wire). The negative potential gradient is not related to magnetic intensity.

Magnetic flux is the measure of the magnetic field passing through a given area. It is given by the dot product of the magnetic field vector (B) and the area vector (A) integrated over the area.

It is represented as Φm = ∫B · dA. The negative of the potential gradient is not related to magnetic flux.

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Tagged under Physics · Electrostatics · 2021