Ask & Answer

Ask & Answer: India's Largest Education Community

1000+ExpertsQuick ResponsesReliable Answers

Your Question

Edit

Add relevant tags to get quick responses. Cancel Post

All Questions

New Question

5 months ago

NCERT Exam

What is weightage of Class 11 Physics Chapter 11 Thermodynamics in NEET and JEE Main exams?

0 Follower 3 Views

Pallavi Pathak

Contributor-Level 10

In NEET entrance test, the weightage of Class 11 Physics Chapter 11 Thermodynamics is around 7%. Students should thoroughly understand the thermodynamic laws and internal energy. The medical entrance test includes theory and numerically-based questions. For JEE Main, the chapter has more significance, and it has nearly 15% weightage of the total Physics syllabus.

0 0

New Question

5 months ago

Binomial Theorem Maths Binomial Theorem

Rakshit is allowed to select 1 or more books out of (2n + 1) distinct books. If the number of ways in which he may not select all of them is 126, then value of n is __________

0 Follower 24 Views

Vishal Baghel

Contributor-Level 10

2²? ¹ - 1 - 1 = 126
2²? ¹ = 2?
2n + 1 = 7
n = 3

0 0

New Question

5 months ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Thermodynamics

n mole of perfect gas undergoes a cyclic process ABCA (see figure) consisting of the following processes.

A->B : Isothermal expansion at temperature T so that the volume is doubled from V₁ to V₂ and Pressure changes from P₁ to P₂.

B->C : Isobaric compression at pressure P₂ to initial volume V₁.

C->A : Isobaric change leading to change of pressure from P₂ to P₁.

Total work done in the complete cycle ABCA is:

0 Follower 6 Views

alok kumar singh

Contributor-Level 10

$W_{A B} = n R T l n \frac{2 V_{1}}{V_{1}} = n R T l n 2 .$

$W_{B C} = P_{2} (V_{1} - 2 V_{1}) = - P_{2} V_{1} = - \frac{1}{2} n R T$

[At B, 2P₂ V₁ = nRT]

$W_{C A} = 0$ [CA is isochoric process].

$W_{A B C A} = W_{A B} + W_{B C} + W_{C A} = n R T (l n (2) - \frac{1}{2})$

0 0

New Question

5 months ago

Relations and Functions Maths

Let g(x) = ||x + 2| - 3|. If a denotes the number of relative minima, b denotes the number of relative maxima and c denotes the product of the zeros. Then the value of (a + 2b - c) is __________

0 Follower 9 Views

Vishal Baghel

Contributor-Level 10

c = -5, a = 2, b = 1

0 0

New Question

5 months ago

Physics NCERT Exemplar Solutions Class 12th Chapter Twelve Physics

The current in a coil of self inductance 2.0 H is increasing according to I = 2sin(t2)A. The amount of energy spent during the period when current changes from 0 to 2 A is…………J.

0 Follower 4 Views

Raj Pandey

Contributor-Level 9

Given, L = 2H

l = 2 sin (t²)

$u = \int_{0}^{2} L i d i = \frac{L}{2} {[i^{2}]}_{0}^{2} = \frac{L}{2} [4 - 0]$

$u = \frac{2}{2} \times 4 = 4 J$

0 0

New Question

5 months ago

Relations and Functions Maths

In a geometric progression the ratio of the sum of the first 5 terms to the sum of their reciprocals is 49 and sum of the first and the third term is 35. The fifth term of the G.P. is p, the value of 4p is __________

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

Let five terms in G.P. be a/r², a/r, a, ar, ar²
Then, a (r? ² + r? ¹ + 1 + r + r²) / (1/a) (r? ² + r? ¹ + 1 + r? ¹ + r? ²) = 49
⇒ a² = 49 ⇒ a = ±7
Also, a/r² + a = 35
Therefore, a = -7 is not possible
Now, fifth term = ar² = a (7/28) = p ⇒ 4p = 7

0 0

New Question

5 months ago

Conic Sections Maths

A circle passes through the points (2, 2) and (9, 9) and touches the x-axis. The absolute value of the difference of possible x-coordinate of the point of contact is __________

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

(12) &

...more

0 0

New Question

5 months ago

Physics Current Electricity Physics NCERT Exemplar Solutions Class 12th Chapter Twelve

The total current supplied to the circuit is shown in figure by the 5 V battery is……………..A.

0 Follower 47 Views

Raj Pandey

Contributor-Level 9

$\equiv R e q = 2.5 Ω$

$l = \frac{v}{R_{e q}} = \frac{5}{2.5} = 2 A$

0 0

New Question

5 months ago

Permutations and Combinations Maths

Number of ways in which three distinct numbers can be selected between 1 and 20 both inclusive, whose sum is even is __________

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

All even + 2 odd 1 even
¹? C? + ¹? C? × ¹? C?
120 + 450
=570

0 0

New Question

5 months ago

Power Physics

What are conservative and non conservative forces?

0 Follower 2 Views

Aadit Singh Uppal

Contributor-Level 10

Power calculations can also differ based on the nature of forces, which are as follows:

Conservative Forces: Here, work done is path-independent. e.g., gravity, spring force
Non-Conservative Forces: Work depends on the path. e.g., friction

0 0

New Question

5 months ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Moment of Inertia

Moment of inertia (M.I) of four bodies, having same mass and radius, and reported as:

I₁ = M.I. of thin circular ring about its diameter

I₂ = M.I. of circular disc about an axis perpendicular to disc and going through the centre,

I₃ = M.I. of solid cylinder about its axis and

I₄ = M.I. of solid sphere about its diameter.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

$l_{1} = \frac{1}{2} m r^{2}$

$\begin{array}{l} l_{2} = \frac{1}{2} m r^{2} \\ l_{3} = \frac{1}{2} m r^{2} \\ l_{4} = \frac{2}{5} m r^{2} \end{array}$

0 0

New Question

5 months ago

NCERT Exam

What is weightage of Class 11 Physics Chapter 11 Thermodynamics in NEET and JEE Main exams?

0 Follower 2 Views

New Question

5 months ago

Statistics Maths Statistics

If the co-efficient of variation of a distribution is 60 and its standard deviation is 24, then its arithmetic mean is __________

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

C.O.V = σ/x? × 100

0 0

New Question

5 months ago

Overview Physics Current Electricity

A resistor develops 300 J of thermal energy in 15s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10s is……………..J.

0 Follower 2 Views

Raj Pandey

Contributor-Level 9

$H = I^{2} R t = 2^{2} \times R \times 15$

$\Rightarrow 300 = 60 R$

$R = 5 Ω$

Now for 3A, time = 10 sec

$H' = l^{2} R t = 3^{2} \times 5 \times 10 = 450 J$

0 0

New Question

5 months ago

Maths Class 12th

The value of cot^-1(2² + 1/2) + cot^-1(2³ + 1/2²) + ……∞ is equal to tan^-1 λ, then the value of λ is equal to __________

0 Follower 6 Views

Vishal Baghel

Contributor-Level 10

T? = cot? ¹ (2²? ¹ + 1/2? ) = cot? ¹ (1 + 2²? ¹)/2? ) = tan? ¹ (2? / (1 + 2²? ¹)
T? = tan? ¹ (2? ¹ - 2? ) / (1 + 2? ¹ . 2? ) = tan? ¹ (2? ¹) – tan? ¹ (2? )
S∞ = π/2 - tan? ¹ (2) = cot? ¹ (2) = tan? ¹ (1/2)

0 0

New Question

5 months ago

Sister Nivedita University Sister Nivedita University Courses

0 Follower 2 Views

Saumya Khandelwal

Contributor-Level 8

Sister Nivedita University, also known as SNU, is a renowned university in West Bengal that offers quality education to students in the fields of Humanities, Engineering, Social Sciences, Agricultural Sciences, etc. The popular programmes offered at Sister Nivedita University are BTech, BSc, and MBA. These courses are offered to students at the UG and PG levels for a duration of 4, 3, and 2 years, respectively.

0 0

New Question

5 months ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Overview

Two stars of masses m and 2m at a distance d rotate about their common centre of mass in free space. The

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

$m ω^{2} . \frac{2 d}{3} = \frac{G . m . 2 m}{d^{2}} \Rightarrow ω = \sqrt[]{\frac{3 G m}{d^{3}}}$

$T = \frac{2 π}{ω} = 2 π \sqrt[]{\frac{d^{3}}{3 G m}}$

0 0

New Question

5 months ago

Straight Lines Maths

If two of the straight lines given by 3x³ + 3x²y – 3xy² + dy³ = 0, are at right angles, then d is equal to __________

0 Follower 7 Views

Vishal Baghel

Contributor-Level 10

3x² + 3x²y - 3xy² + dy³ = 0
3x² (x + y) – 3y² (x - dy/3) = 0
x - dy/3 = x + y for getting two perpendicular straight lines
d = -3

0 0

New Question

5 months ago

Physics Electrostatic Potential and Capacitance Physics NCERT Exemplar Solutions Class 12th Chapter Twelve

The equivalent capacitance between points A and B in below shown figure will be…………. $μ F .$

0 Follower 5 Views

Raj Pandey

Contributor-Level 9

ceq = $\frac{24 \times 8}{32} = 6 μ F$

0 0

New Question

5 months ago

Conic Sections Maths

The value of 2 cos 20º cos 40° cos 80° is equal to __________

0 Follower 1 View

Vishal Baghel

Contributor-Level 10

cos 20° cos 40° cos 80°
= (2 sin 20° cos 20° cos 40° cos 80°) / (2 sin 20°)
= (2 sin 40° cos 40° cos 80°) / (2² sin 20°)
= (2 sin 80° cos 80°) / (2³ sin 20°)
= 1/8

0 0

Ask & Answer
Panel of Experts

View Experts Panel

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Ask & Answer: India's Largest Education Community

Need guidance on career and education? Ask our experts

Your Question

All Questions

Share Your College Life Experience