MCQ
The constant $k$ in Coulomb's law depends upon:
  • Nature of medium
  • B
    System of units
  • C
    Intensity of charge
  • D
    Both $(a)$ and $(b)$

Answer

Correct option: A.
Nature of medium

The value of $\text{K}=\frac{1}{4\pi\in_0}=8.854\times10^{-12}\text{C}^2\text{N}^{-1}\text{m}^{-2}$
Where $ε0​$ is permittivity of free space.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The current flowing in two coaxial coils in the same direction. On increasing the distance between the two, the electric current will
A charged particle initially at rest at $O$,when released follows a trajectory as shown alongside. Such a trajectory is possible in the presence of
In the circuit shown, $X$ is joined to $Y$ for a long time, and then $X$ is joined to $Z$. The total heat produced in $R_2$ is :=
Maxwell in his famous equations of electromagnetism introduced the concept of:
Assertion : The earth’s magnetic field is due to iron present in its core.
Reason : At a high temperature magnet losses its magnetic property or magnetism.
A glass prism (μ = 1.5) is dipped in water (μ = 4/3) as shown in figure. A light ray is incident normally on the surface AB. It reaches the surface BC after totally reflected, if
Assertion : The force of repulsion between atomic nucleus and a-particle varies with distance according to inverse square law.
Reason : Rutherford did a-particle scattering experiment.
A metallic block has no potential difference applied across it, then the mean velocity of free electrons is $T$ = absolute temperature of the block)
A $50$ turns circular coil has a radius of $3\;cm$, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field $B$ increased from $0.10$ tesla to $0.35$ tesla in $2$ milliseconds. The average induced $e.m.f$. in the coil is.......$V$
The difference between the mass of a nucleus and the total mass of the constituents is its.