NEET Electric Charges and Fields PYQ practice sheet

4 previous-year NEET Physics questions from Electric Charges and Fields, newest papers first. Electric Charges and Fields carries 7 of the Physics questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   NEET 2023

   An electric dipole is placed at an angle of $30^\circ$ with an electric field of intensity $2\times10^{5}\ \mathrm{N\,C^{-1}}$. It experiences a torque equal to $4\ \mathrm{N\,m}$. Calculate the magnitude of charge on the dipole, if the dipole length is $2\ \mathrm{cm}$.

   • (A)
     $2\ \mathrm{mC}$
   • (B)
     $8\ \mathrm{mC}$
   • (C)
     $6\ \mathrm{mC}$
   • (D)
     $4\ \mathrm{mC}$
2. 2.

   NEET 2022

   Two point charges $-q$ and $+q$ are placed at a distance of $L$, as shown in the figure. The magnitude of electric field intensity at a distance $R$ ($R\gg L$) varies as:

   • (A)
     $\dfrac{1}{R^6}$
   • (B)
     $\dfrac{1}{R^2}$
   • (C)
     $\dfrac{1}{R^3}$
   • (D)
     $\dfrac{1}{R^4}$
3. 3.

   NEET 2021

   A dipole is placed in an electric field as shown. In which direction will it move ? Figure: the electric field lines diverge from a point on the left and spread out towards the right, so the field is stronger on the left and weaker on the right. The field $\vec{E}$ points to the right along the central line. A dipole lies along the central line with the charge $+q$ on the left and the charge $-q$ on its right.

   • (A)
     towards the right as its potential energy will increase.
   • (B)
     towards the left as its potential energy will increase.
   • (C)
     towards the left as its potential energy will decrease.
   • (D)
     towards the right as its potential energy will decrease.
4. 4.

   NEET 2020

   A spherical conductor of radius $10$ cm has a charge of $3.2\times10^{-7}$ C distributed uniformly. What is the magnitude of electric field at a point $15$ cm from the centre of the sphere? $\left(\frac{1}{4\pi\epsilon_0}=9\times10^{9}\ \mathrm{N\,m^2/C^2}\right)$

   • (A)
     $1.28\times10^{4}$ N/C
   • (B)
     $1.28\times10^{5}$ N/C
   • (C)
     $1.28\times10^{6}$ N/C
   • (D)
     $1.28\times10^{7}$ N/C