NEET 2019 Physics Solutions with NCERT Concepts | EducationPath

Q1PhysicsSection AClass 11Easy

Units and Measurements

The dimensions of

(\mu_0 \varepsilon_0)^{-1/2}

are the same as that of:

Topic: Dimensions of Physical Constants

Q2PhysicsSection AClass 11Easy

Thermodynamics

An ideal gas undergoes four different thermodynamic processes from the same initial state: Isobaric, Isothermal, Adiabatic, and Isochoric. Which process curve has the STEEPEST slope on a P-V diagram?

Topic: Thermodynamic Processes & PV Slopes

Q3PhysicsSection AClass 12Easy

Current Electricity

A uniform copper wire of resistance

R

is stretched uniformly such that its length increases by

2\%

. Assuming constant density and volume, the percentage increase in resistance is approximately:

Topic: Resistance & Stretching of Wire

Q4PhysicsSection AClass 12Easy

Dual Nature of Radiation and Matter

An electron is accelerated from rest through a potential difference of

V = 100\text{ V}

. What is the de Broglie wavelength associated with the electron?

Topic: de Broglie Wavelength of Electron

Q5PhysicsSection AClass 11Moderate

Motion in a Plane

A projectile is launched from horizontal ground with speed

u

at an angle

\theta

. If the horizontal range

R

is equal to four times the maximum height

H

(

R = 4H

), the angle of projection

\theta

is:

Topic: Projectile Motion - Range & Height

Q6PhysicsSection AClass 11Moderate

Laws of Motion

A block of mass

m

rests on a rough inclined plane of angle

\theta

. If the coefficient of static friction is

\mu_s

, the angle of repose

\alpha

at which the block just begins to slide down satisfies:

Topic: Angle of Repose & Friction

Q7PhysicsSection AClass 11Easy

Work, Energy and Power

A body of mass

m

moving with speed

v

collides head-on elastically with an identical body of mass

m

at rest. After collision, the velocity of the first body is:

Topic: Elastic Collision in 1D

Q8PhysicsSection AClass 11Moderate

System of Particles and Rotational Motion

A solid sphere, solid cylinder, and circular ring of equal mass and radius roll down without slipping from rest on an inclined plane. The order in which they reach the bottom is:

Topic: Rolling without Slipping

Q9PhysicsSection AClass 11Easy

Gravitation

The escape velocity from Earth is

v_e = 11.2\text{ km/s}

. If a planet has twice the mass and half the radius of Earth, its escape velocity will be:

Topic: Escape Velocity

Q10PhysicsSection AClass 11Easy

Mechanical Properties of Solids

The elastic strain energy stored per unit volume in a stretched wire is:

Topic: Elastic Potential Energy Density

Q11PhysicsSection AClass 11Easy

Mechanical Properties of Fluids

The excess pressure inside a soap bubble of radius

R

and surface tension

T

in air is:

Topic: Surface Tension & Excess Pressure

Q12PhysicsSection AClass 11Easy

Thermal Properties of Matter

According to Wien’s Displacement Law for blackbody radiation, the wavelength

\lambda_m

corresponding to maximum spectral radiance is related to absolute temperature

T

by:

Topic: Wien Displacement Law

Q13PhysicsSection AClass 11Easy

Kinetic Theory of Gases

At what temperature will the root mean square (rms) speed of oxygen gas molecules (

O_2

,

M = 32\text{ g/mol}

) be equal to that of helium gas molecules (

He

,

M = 4\text{ g/mol}

) at

0^\circ\text{C}

(

273\text{ K}

)?

Topic: RMS Velocity of Gas Molecules

Q14PhysicsSection AClass 11Easy

Oscillations

In simple harmonic motion of amplitude

A

, at what displacement

x

from the mean position are the kinetic energy and potential energy equal (

K = U

)?

Topic: Simple Harmonic Motion - Energy

Q15PhysicsSection AClass 11Moderate

Waves

A closed organ pipe of length

L_c

(closed at one end) and an open organ pipe of length

L_o

(open at both ends) resonate in their respective fundamental frequencies. If the frequencies are equal (

f_c = f_o

), the ratio

L_c / L_o

is:

Topic: Organ Pipes & Harmonics

Q16PhysicsSection AClass 12Easy

Electric Charges and Fields

An electric dipole of dipole moment

\vec{p}

placed in a uniform electric field

\vec{E}

experiences a torque

\vec{\tau}

and potential energy

U

given by:

Topic: Electric Dipole in Uniform Field

Q17PhysicsSection AClass 12Easy

Electrostatic Potential and Capacitance

A parallel plate capacitor of capacitance

C_0

is charged to potential

V_0

and disconnected from the battery. A dielectric slab of dielectric constant

K

is now inserted between the plates. The new potential difference

V

and stored energy

U

become:

Topic: Parallel Plate Capacitor with Dielectric

Q18PhysicsSection AClass 12Moderate

Moving Charges and Magnetism

The magnetic field at the centre of a circular current loop of radius

R

carrying current

I

is

B_0

. At what axial distance

x

from the centre of the loop will the magnetic field be

B_0 / 8

?

Topic: Biot-Savart Law - Circular Loop Axis

Q19PhysicsSection AClass 12Easy

Magnetism and Matter

A material has magnetic susceptibility

\chi = -0.00015

. This material is classified as:

Topic: Magnetic Properties of Materials

Q20PhysicsSection AClass 12Easy

Electromagnetic Induction

A straight conducting rod of length

L

moves with uniform velocity

v

perpendicular to its length in a uniform magnetic field

B

directed perpendicular into the plane. The motional emf induced across the ends is:

Topic: Lenz Law & Motional EMF

Q21PhysicsSection AClass 12Challenging

Alternating Current

In standard NEET Physics Question 21, evaluate the physical system parameter under standard boundary conditions.

Topic: Core Concepts & Problem Solving in Topic 21

Q22PhysicsSection AClass 12Moderate

Alternating Current

In standard NEET Physics Question 22, evaluate the physical system parameter under standard boundary conditions.

Topic: Core Concepts & Problem Solving in Topic 22

Q23PhysicsSection AClass 12Easy

Alternating Current

In standard NEET Physics Question 23, evaluate the physical system parameter under standard boundary conditions.

Topic: Core Concepts & Problem Solving in Topic 23

Q24PhysicsSection AClass 12Challenging

Alternating Current

In standard NEET Physics Question 24, evaluate the physical system parameter under standard boundary conditions.

Topic: Core Concepts & Problem Solving in Topic 24

Q25PhysicsSection AClass 12Easy

Alternating Current

In standard NEET Physics Question 25, evaluate the physical system parameter under standard boundary conditions.

Topic: Core Concepts & Problem Solving in Topic 25

Q26PhysicsSection AClass 12Moderate