1
JEE Main 2023 (Online) 15th April Morning Shift
+4
-1
The electric field due to a short electric dipole at a large distance $(r)$ from center of dipole on the equatorial plane varies with distance as :
A
$\frac{1}{r^{2}}$
B
$\frac{1}{r}$
C
$r$
D
$\frac{1}{r^{3}}$
2
JEE Main 2023 (Online) 13th April Evening Shift
+4
-1

A $$10 ~\mu \mathrm{C}$$ charge is divided into two parts and placed at $$1 \mathrm{~cm}$$ distance so that the repulsive force between them is maximum. The charges of the two parts are:

A
$$9 ~\mu\mathrm{C}, 1 ~\mu \mathrm{C}$$
B
$$5 ~\mu\mathrm{C}, 5 ~\mu \mathrm{C}$$
C
$$8 ~\mu\mathrm{C}, 2 ~\mu \mathrm{C}$$
D
$$7 ~\mu\mathrm{C}, 3 ~\mu \mathrm{C}$$
3
JEE Main 2023 (Online) 13th April Morning Shift
+4
-1

Two charges each of magnitude $$0.01 ~\mathrm{C}$$ and separated by a distance of $$0.4 \mathrm{~mm}$$ constitute an electric dipole. If the dipole is placed in an uniform electric field '$$\vec{E}$$' of 10 dyne/C making $$30^{\circ}$$ angle with $$\vec{E}$$, the magnitude of torque acting on dipole is:

A
$$4 \cdot 0 \times 10^{-10} ~\mathrm{Nm}$$
B
$$1.5 \times 10^{-9} ~\mathrm{Nm}$$
C
$$1.0 \times 10^{-8} ~\mathrm{Nm}$$
D
$$2.0 \times 10^{-10} ~\mathrm{Nm}$$
4
JEE Main 2023 (Online) 12th April Morning Shift
+4
-1

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : If an electric dipole of dipole moment $$30 \times 10^{-5} ~\mathrm{C} ~\mathrm{m}$$ is enclosed by a closed surface, the net flux coming out of the surface will be zero.

Reason R : Electric dipole consists of two equal and opposite charges.

In the light of above, statements, choose the correct answer from the options given below.

A
A is true but R is false
B
A is false but R is true
C
Both A and R are true but R is NOT the correct explanation of A
D
Both A and R are true and R is the correct explanation of A
EXAM MAP
Medical
NEET