COMEDK 2025 Morning Shift | Electrostatics Question 1 | Physics

Point charges $-3 Q,-q, 2 q$ and $2 Q$ are placed, one at each corner of a square. The relation between Q and q for which the potential at the centre of the square is zero is

$Q=\frac{1}{q}$

$Q=-q$

$Q=\frac{-1}{q}$

$Q=q$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

For the charge configuration shown here, which of the following is not true?

COMEDK 2025 Morning Shift Physics - Electrostatics Question 1 English

$\frac{q_1}{q_2}=1$

$\left|q_1\right|=\left|q_2\right|$

$\left|q_1\right|>\left|q_2\right|$

$q_1$ and $q_2$ are negative

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

Two identical conducting balls having positive charges $q_1$ and $q_2$ are separated by a distance $r$. If they are made to touch each other and then separated to the same distance, the force between them will be

Same as before

zero

Less than before

More than before

COMEDK 2024 Evening Shift

MCQ (Single Correct Answer)

-0

A neutral water molecule is placed in an electric field $$E=2.5 \times 10^4 \mathrm{NC}^{-1}$$. The work done to rotate it by $$180^{\circ}$$ is $$5 \times 10^{-25} \mathrm{~J}$$. Find the approximate separation of centre of charges.

$$1.25 \times 10^{-10} \mathrm{~m}$$

$$0.625 \times 10^{-10} \mathrm{~m}$$

$$0.625 \times 10^{-9} \mathrm{~m}$$

$$0.998 \times 10^{-10} \mathrm{~m}$$

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