Polar molecules are the molecules:

 1 that acquires a dipole moment only when the magnetic field is absent. 2 has a permanent electric dipole moment. 3 has zero dipole moment. 4 that acquire a dipole moment only in the presence of an electric field due to displacement of charges.
Subtopic:  Electric Dipole |
64%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A particle is released from a height of $$S$$ above the surface of the earth. At a certain height, its kinetic energy is three times its potential energy. The distance from the earth's surface and the speed of the particle at that instant are respectively:
 1 $${S \over 2},{ \sqrt{3gS} \over 2}$$ 2 $${S \over 4}, \sqrt{3gS \over 2}$$ 3 $${S \over 4},{ {3gS} \over 2}$$ 4 $${S \over 4},{ \sqrt{3gS} \over 3}$$
Subtopic:  Gravitational Potential Energy |
69%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Match Column I and Column II with appropriate relations.

 Column I Column II (A) Drift Velocity (P) $$\frac{ \mathrm{m}}{\mathrm{ne}^2 \rho}$$ (B) Electrical Resistivity (Q) $$nev_d$$ (C) Relaxation Period (R) $$\frac{ \mathrm{eE}}{\mathrm{m}} \tau$$ (D) Current Density (S) $$\frac{E}{J}$$

 (A) (B) (C) (D) 1. (R) (P) (S) (Q) 2. (R) (Q) (S) (P) 3. (R) (S) (P) (Q) 4. (R) (S) (Q) (P)
Subtopic:  Current & Current Density |
54%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

If force $$[F]$$, acceleration $$[A]$$ and time $$[T]$$ are chosen as the fundamental physical quantities, then find the dimensions of energy:
1. $$\left[FAT^{-1}\right]$$
2. $$\left[FA^{-1}T\right]$$
3. $$\left[FAT\right]$$
4. $$\left[FAT^{2}\right]$$

Subtopic:  Dimensions |
64%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The escape velocity from the Earth's surface is $$v$$. The escape velocity from the surface of another planet having a radius, four times that of Earth and the same mass density is:

 1 $$3v$$ 2 $$4v$$ 3 $$v$$ 4 $$2v$$
Subtopic:  Escape velocity |
59%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A small block slides down on a smooth inclined plane starting from rest at time $$t=0.$$ Let $$S_n$$ be the distance traveled by the block in the interval $$t=n-1$$ to $$t=n.$$ Then the ratio $$\dfrac{S_n}{S_{n +1}}$$ is:

 1 $$\dfrac{2n+1}{2n-1}$$ 2 $$\dfrac{2n}{2n-1}$$ 3 $$\dfrac{2n-1}{2n}$$ 4 $$\dfrac{2n-1}{2n+1}$$
Subtopic:  Uniformly Accelerated Motion |
57%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The velocity of a small ball of mass $$M$$ and density $$d$$, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is $$d\over 2$$ then the viscous force acting on the ball will be:

 1 $$\frac{3Mg}{2}$$ 2 $$2Mg$$ 3 $$\frac{Mg}{2}$$ 4 $$Mg$$
Subtopic:  Viscosity |
60%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A thick current-carrying cable of radius '$$R$$' carries current $$'I'$$ uniformly distributed across its cross-section. The variation of magnetic field $$B(r)$$ due to the cable with the distance '$$r$$' from the axis of the cable is represented by:

 1 2 3 4
Subtopic:  Ampere Circuital Law |
80%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Find the value of the angle of emergence from the prism given below for the incidence ray shown. The refractive index of the glass is $$\sqrt{3}$$.

1. $$45^{\circ}$$
2. $$90^{\circ}$$
3. $$60^{\circ}$$
4. $$30^{\circ}$$

Subtopic:  Prisms |
56%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A screw gauge gives the following readings when used to measure the diameter of a wire:
Main scale reading: $$0$$ mm
Circular scale reading: $$52$$ divisions
Given that $$1$$ mm on the main scale corresponds to $$100$$ divisions on the circular scale, the diameter of the wire that can be inferred from the given data is:
1. $$0.26$$ cm
2. $$0.052$$ cm
3. $$0.52$$ cm
4. $$0.026$$ cm

Subtopic:  Measurement & Measuring Devices |
67%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints