NEET November Plan Physics 1 for NEET & AIIMS Exams

Question 1

An electric dipole of moment

is lying along a uniform electric field

. The work done in rotating the dipole by 90° is :

Question 2

A square surface of side L m is in the plane of the paper. A uniform electric field

(V/m), also in the plane of the paper, is limited only to the lower half of the square surface, (see figure). The electric flux in SI units associated with the surface is :

Question 3

A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is

Question 4

A parallel-plate capacitor of area A, plate separation d and capacitance C is filled with four dielectric materials having dielectric constants k₁, k₂, k₃ and k₄ as shown in the figure below. If a single dielectric material is to be used to have the same capacitance C in this capacitor, then its dielectric constant k is given by

Question 5

A, B and C are three points in a uniform electric field.
The electric potential is:

Question 6

Consider the junction diode as an ideal. The value of current flowing through AB is

Question 7

A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect?

Question 8

A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system:-

Question 9

The work done in taking a unit positive charge from P to A is W_A and from P to B is W_B. Then

Question 10

The electric potential at a point in free space due to a charge Q coulomb is Q x 10¹¹ V. The electric field at that point is

Question 11

Three concentric spherical metallic shells A, B and C of radii a, b and c (a < b < c) have charge densities ï, –ï and ï respectively. The potential of A, B and C are

Question 12

In a region the potential is represented by V(x, y, z) = 6x – 8xy –8y + 6yz, where V is in volts and x, y, z, are in meters. The electric force experienced by a charge of 2 coulomb situated at point (1, 1,1) is :

Question 13

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are:

Question 14

Three identical spheres, each having a charge q and radius R, are kept in such a way that each touches the other two. Find the magnitude of the electric force on any sphere due to other two.

Question 15

An electron is released from rest in a region of space with a non-zero electric field. Which of the following statements is true?