Tags physics ncert exemplar solutions class 12th chapter two

physics ncert exemplar solutions class 12th chapter two

Get insights from 123 questions on physics ncert exemplar solutions class 12th chapter two, answered by students, alumni, and experts. You may also ask and answer any question you like about physics ncert exemplar solutions class 12th chapter two

Follow Ask Question

123

Questions

Discussions

Active Users

Followers

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Kinetic Theory

A flask contains argon and oxygen in the ratio of 3 : 2 in mass and the mixture is kept at 27°C. The ratio of their average kinetic energy per molecule respectively will be:

0 Follower 1 View

Vishal Baghel

Contributor-Level 10

The average kinetic energy (per molecule)of any (ideal) gas (be it monoatomic like Argon, diatomic like oxygen or polyatomic) is always equal to $\frac{3}{2} K_{B} T .$ If depends only on temperature, and is independent of the nature of the gas. So, Answer is 1 : 1.

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Mechanical Properties of Fluids

If p is the density and $η$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number Re is:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

Kindly consider the following answer

$R e = \frac{ρ v d}{η}$

0 0

New question posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Mechanical Properties of Fluids

If p is the density and $η$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number R_e is:

0 Follower 2 Views

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Gravitation

Given below are two statements : One is labeled as Assertion A and the other is labeled as Reason R.

Assertion A : If we move form poles to equator, the direction of acceleration due to gravity of earth always points towards the centre of earth without any variation in its magnitude.

Reason R : At equator, the direction of acceleration due to the gravity is towards the centre of earth.

In the light of above statements, chose the correct answer from the options given below

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$g' = g - ω^{2} R s i n θ$

$g' (a t θ = 0 p o l e) = g$

$g' (a t θ = 90 °, e q u a t o r) = g - ω^{2} R$

g decreases as we move bole to equator

So, A is false statement

But 'R' statement is true

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two System of Particles and Rotational Motion

A solid spherical ball is rolling on a frictionless horizontal plane surface about its axis of symmetry. The ratio of rotational kinetic energy of the ball to its total kinetic energy is-

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

K.ER (Rotational) = $\frac{1}{2} I_{C M} ω^{2} = \frac{1}{2} * \frac{2}{5} M R^{2} ω^{2} = \frac{M R^{2} ω^{2}}{5}$ - (1)

$K . E_{T o t a l} = K . E_{R} + K . E_{T}$

$= \frac{M R^{2} ω^{2}}{5} + \frac{1}{2} M V_{c m^{2}}$

$= \frac{7 M R^{2} ω^{2}}{10}$ - (2)

$\frac{k . E_{R}}{K . E_{T o t a l}} = \frac{1}{5} * \frac{10}{7} = \frac{2}{7}$

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Work, Energy and Power

Arrange the four graphs in descending order of total work done; where W₁, W₂, W₃ and W₄ are the work done corresponding to figure a, b, c and d respectively.

(a) W₃ > W₂ > W₁ >W₄ (b) W₃ > W₂ > W₄ > W₁ (c) (d) W₂> W₃ > W₁ > W₄

0 Follower 5 Views

Vishal Baghel

Contributor-Level 10

Work done represents are under

F vs x diagram

w₃ > w₂ > w₁ > w₄

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Laws of Motion

In the arrangement shown in figure a₁, a₂, a₃ and a₄ are the accelerations of masses m₁, m₂, m₃ and m₄ respectively. Which of the following relation is true for this arrangement?

0 Follower 6 Views

Vishal Baghel

Contributor-Level 10

$\sum_{}^{} \vec{T} . \vec{a} = 0$

$\frac{T}{2} a_{1} + \frac{T}{4} a_{2} + \frac{T}{8} a_{3} + \frac{T}{8} a_{4} = 0$

$\Rightarrow 4 a_{1} + 2 a_{2} + a_{3} + a_{4} = 0$

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Electromagnetic Induction

The dimension of mutual inductance is:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$e = - M \frac{d i}{d t}$

$M = \frac{e}{d i / d t} = M L^{2} T^{- 2} A^{- 2}$

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Electrostatic Potential and Capacitance

A person is standing in an elevator. In which situation, he experiences weight loss?

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

F.B.D of person w.r.t. elevator

mg – N = ma

N = mg – ma

N decreases so, person experiences weight loss.

0 0

New answer posted

2 months ago

physics ncert exemplar solutions class 12th chapter two Physics Electrostatic Potential and Capacitance

A positive charge particle of 100mg is thrown in opposite direction to a uniform electric field of strength 1 * 10⁵ NC^-1, If the charge on the particle is $40 μ C$ and the initially velocity is 200 ms^-1, how much distance it will travel before coming to the rest momentarily:

0 Follower 4 Views

alok kumar singh

Contributor-Level 10

a = $\frac{q E}{m} = \frac{40 * 1 0^{? 6} * 1 0^{5}}{100 * 1 0^{? 3} * 1 0^{? 3}}$

= 40 * 10³ m/sec²

v² = u² + 2a s

$? 0 = {(200)}^{2} ? 2 * 40 * 1 0^{3} s$

$s = \frac{200 * 200}{2 * 40 * 1 0^{3}} = 0.5 m$

0 0

View All 2 Answers

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

65k Colleges
1.2k Exams
688k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

physics ncert exemplar solutions class 12th chapter two

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience