Sharpen your Physics skills with chapter-wise NEET practice questions. Designed for NEET aspirants, these questions cover all Physics topics.
A physicist uses dimensional analysis to derive an expression for the energy (E) of a particle based on its mass (m), velocity (v), and Planck's constant (h). They arrive at . Why is this result incomplete?
Dimensional analysis cannot account for dimensionless quantities like the fine-structure constant, which might be involved in a more complex relationship.
Planck's constant is not relevant for the energy of a classical particle, invalidating the analysis.
Dimensional analysis cannot handle situations involving both mass and velocity.
The correct expression involves a logarithmic relationship, which dimensional analysis cannot capture.
What is not true for equipotential surface for uniform electric field?
Electric field lines are perpendicular to equipotential surfaces
Equipotential surfaces are parallel to each other
The work done in moving a charge from one point to another on an equipotential surface is zero
Equipotential surfaces are curved surfaces
Consider the following statements about electric dipole and select the correct ones
S1 : Electric dipole moment vector is directed from the negative charge to the positive charge
S2 : The electric field of a dipole at a point with position vector depends on as well as the angle between and
S3 : The electric dipole potential falls off as and not as
S4 : In a uniform electric field, the electric dipole experiences no net forces but a torque
S2, S3 and S4
S3 and S4
S2 and S3
All four
The electric field intensity E, due to an electric dipole of moment p, at a point on the equatorial line is
Parallel to the axis of the dipole and opposite to the direction of the dipole moment p
Perpendicular to the axis of the dipole and is directed away from it
Parallel to the dipole moment
Perpendicular to the axis of the dipole and is directed towards it
Two thin wire rings each having radius are placed at a distance apart with their axes coinciding. The charges on the two rings are . The potential difference between the centres of the two rings is
\frac{q}{2\pi\epsilon_0} \left( \frac{1}{R} - \frac{1}{\sqrt{R^2 + d^2}} \right)
\frac{q}{4\pi\epsilon_0} \left( \frac{1}{R} - \frac{1}{\sqrt{R^2 + d^2}} \right)
\frac{q}{\pi\epsilon_0} \left( \frac{1}{R} - \frac{1}{\sqrt{R^2 + d^2}} \right)
\frac{2q}{\pi\epsilon_0} \left( \frac{1}{R} - \frac{1}{\sqrt{R^2 + d^2}} \right)
Considering a group of positive charges, which of the following statements is correct?
Net potential of the system cannot be zero at a point but net electric field can be zero at that point.
Both the net potential and the net field can be zero at a point.
Net potential of the system at a point can be zero but net electric field can't be zero at that point.
Both the net potential and the net electric field cannot be zero at a point.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason
R. Assertion A : Two metallic spheres are charged to the same potential. One of them is hollow and
another is solid, and both have the same radii. Solid sphere will have lower charge than the hollow one. Reason R: Capacitance of metallic spheres depend on the radii of spheres. In the light of the above statements, choose the correct answer from the options given below:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
