MHT CET 2026 20th April Evening Shift | Electrostatics Question 3 | Physics

Two point charges placed in air separated by distance $R$ exert a force $F$ on each other. Now the space between those charges is filled with dielectric constant $K$. At distance $R_1$ between the charges, the same force is exerted as $F$. Then

$R_1 = \sqrt{K}R$

$R_1 = R$

$R_1 = \dfrac{R}{K}$

$R_1 = \dfrac{R}{\sqrt{K}}$

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

Four electric charges $+q$ , $+q$ , $-q$ , and $-q$ are placed in order at the corners of a square of side '$2r$'. The electric potential at a point midway between the two negative charges is

$\dfrac{1}{4\pi\epsilon_0}\,\dfrac{2q}{r}\left[\dfrac{1}{\sqrt{5}} - 1\right]$

$\dfrac{1}{4\pi\epsilon_0}\,\dfrac{q}{r}\left[\dfrac{1}{\sqrt{5}} + 1\right]$

$\dfrac{1}{4\pi\epsilon_0}\,\dfrac{2q}{r}\left[1 - \sqrt{5}\right]$

$\dfrac{1}{4\pi\epsilon_0}\,\dfrac{q}{r}\left[1 + \sqrt{5}\right]$

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

Two point charges $q_1$ and $q_2$ are '$l$' distance apart. If one of the charges is doubled and the distance between them is halved. The magnitude of the force becomes 'n' times, where 'n' is

$2$

$4$

$8$

$16$

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