CBSE > Class 11 | CBSE Board | Homework Help

Admission Test Physics Chemistry Biology Mathematics Applied Maths Accountancy Economics Business Studies English Core हिंदी कोर History Political Science Geography Sociology Psychology Physical Education Computer Science Informatics Practices Painting Reasoning & Mental Ability Legal Studies गणित लेखाशास्त्र जीव विज्ञान व्यवसाय अध्ययन मनोविज्ञान रसायन विज्ञान भौतिक विज्ञान English Elective NCERT हिंदी ऐच्छिक इतिहास राजनीति विज्ञान भूगोल अर्थशास्त्र समाजशास्त्र Engineering Graphics गृह विज्ञान Home Science शारीरिक शिक्षा Multimedia and Webtech English Elective CBSE (Deleted) Entrepreneurship संस्कृत कोर (भास्वती) संस्कृत ऐच्छिक (शाश्वती) Philosophy (Deleted) Biotechnology Financial Market Management Other Subjects Regional Language Information Technology (802)

Ask questions which are clear, concise and easy to understand.

Ask Question

10. Explain Doppler’s effect and derive an expression for apparent frequency when observer is moving and source is stationary. A travelling harmonic wave on a string is described by y = 5sin (0.010x+6t+Л/4), where x is in cm and t is in second. (a) What is the displacement and velocity of oscillation of a point at x = 2 cm and t = 2s? (b) Is the particle velocity equal to the phase velocity? (c) Locate the points of the string which have the same transverse displacement and velocity as the x = 1cm at t = 2s.

Posted by Rahul Yadav 5 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Derive the expression for the velocity of a longitudinal wave in air. (a) Two tuning forks A and B are vibrating together and 5 beats are heard in 1 s. if some wax is applied on A then 6 beats are heard. Calculate the frequency of B if frequency of A is 256 Hz? (b) In a one end open organ pipe third harmonic is 450 Hz. What is the frequency of next harmonic?

Posted by Rahul Yadav 5 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 4 years, 8 months ago

The beat frequency is always equal to the difference in frequency of the two notes that interfere to produce the beats. So if two sound waves with frequencies of 256 Hz and 254 Hz are played simultaneously, a beat frequency of 2 Hz will be detected.

0Thank You

ANSWER

6. (a) Give Kelvin-Plank statement for second law of thermodynamics. (b) State and prove Carnot’s theorems.

Posted by Rahul Yadav 5 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

5. (a) Explain the principle and working of a heat engine. Obtain an expression for its efficiency. (b) Show that the slope of an adiabatic curve at any point is equal to -.

Posted by Rahul Yadav 5 years, 6 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Is Fashion studies is not in the other subject of class 11 because i really want to take fashion studies but i did not find any syllabus link of fashion studies at my cbse guide??

Posted by Seraph ♂ 5 years, 6 months ago

CBSE > Class 11 > Other Subjects

1 answers

? Royal Thakur ? 5 years, 6 months ago

Prefer another app....

2Thank You

ANSWER

How we learn chemical properties of alkane alkene alkyne

Posted by Garhwal Today 5 years, 6 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Journalise the following transcations : 2018 April5 placed order for goods with m/s kohli and sons for rs 2,50,000,paid them rs 1,00,000 by cheque in advance

Posted by Gugi Jalal 5 years, 6 months ago

CBSE > Class 11 > Accountancy

0 answers

ANSWER

Convert 1+√3i in polar form

Posted by Rajat Rajput 5 years, 6 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Explain money measurements concept

Posted by Gugi Jalal 5 years, 6 months ago

CBSE > Class 11 > Accountancy

2 answers

Sheetal Kaushik 5 years, 6 months ago

Money measurement concept sates that transactions and events that can be measured in money term are recorded in books of accounts of the enterprise.

0Thank You

Yogita Ingle 5 years, 6 months ago

Money Measurement Concept states that only those events that can be expressed in monetary terms are recorded in the books of accounts. For example, 12 television sets of Rs10,000 each are purchased and this event is recorded in the books with a total amount of Rs 1,20,000. Money acts a common denomination for all the transactions and helps in expressing different measurement units into a common unit, for example rupees. Thus, money measurement concept enables consistency in maintaining accounting records. But on the other hand, the adherence to the money measurement concept makes it difficult to compare the monetary values of one period with that of another. It is because of the fact that the money measurement concept ignores the changes in the purchasing power of the money, i.e. only the nominal value of money is concerned with and not the real value. What Rs 1 could buy 10 years back cannot buy today; hence, the nominal value of money makes comparison difficult. In fact, the real value of money would be a more appropriate measure as it considers the price level (inflation), which depicts the changes in profits, expenses, incomes, assets and liabilities of the business.

0Thank You

ANSWER

salary paid to ram Rs 10000

Posted by Ajaib Singh 5 years, 6 months ago

CBSE > Class 11 > Accountancy

1 answers

Sheetal Kaushik 5 years, 6 months ago

salary a/c Dr. 10,000 to cash a/c 10,000

0Thank You

ANSWER

How did cousins go paddling with mother

Posted by Ankur Gautam 5 years, 6 months ago

CBSE > Class 11 > English Core

1 answers

Neelam Sehgal 5 years, 6 months ago

All three girls, poet's mother and two cousins Betty and Dolly went with an uncle.

0Thank You

ANSWER

What is capable force of human beings

Posted by Abhay Singh 5 years, 6 months ago

CBSE > Class 11 > Physics

2 answers

Levin Yadav 5 years, 6 months ago

Its gravitational force

0Thank You

Levin Yadav 5 years, 6 months ago

Are r u for ABPS Kotputli??

0Thank You

ANSWER

Nmk ka daroga khani mai pandit

Posted by Raj Kumar Chaudhary 5 years, 6 months ago

CBSE > Class 11 > हिंदी कोर

0 answers

ANSWER

What are the different type of economic activity

Posted by Yadwinder Singh 5 years, 6 months ago

CBSE > Class 11 > Business Studies

1 answers

Arinan Aggarwal 5 years, 3 months ago

Economic activities are of three types:- 1) business 2)employment 3) profession

0Thank You

ANSWER

Chemistry test should be free

Posted by Zainab Sara 5 years, 6 months ago

CBSE > Class 11 > Chemistry

1 answers

Innocent ?? Boy?? 5 years, 6 months ago

I don't know

0Thank You

ANSWER

{X:X is a natural number,x<5 and x>7}please

Posted by Innocent ?? Boy?? 5 years, 6 months ago

CBSE > Class 11 > Mathematics

3 answers

Innocent ?? Boy?? 5 years, 6 months ago

How explain me

0Thank You

Sahil Kumar 5 years, 6 months ago

It is null set containing phi

0Thank You

Innocent ?? Boy?? 5 years, 6 months ago

It is null set or not

0Thank You

ANSWER

What is universal set??with example

Posted by Innocent ?? Boy?? 5 years, 6 months ago

CBSE > Class 11 > Mathematics

2 answers

Helena Rose 5 years, 6 months ago

Example if you throw a dice the outcomes will be (U)=(1,2,3,4,5,6) eg 2 coin is tossed the outcomes will be (U)=(head, tail)

1Thank You

Helena Rose 5 years, 6 months ago

a set containing all elements of a problem under consideration denoted by (U).

1Thank You

ANSWER

How to make herbillium file

Posted by Shailendra Jha 5 years, 6 months ago

CBSE > Class 11 > Biology

1 answers

Aman Raza 5 years, 6 months ago

Its Herberium ??

0Thank You

ANSWER

Who was Olympiodorus ? Pls help .??????

Posted by Rani Mishra ??? 5 years, 6 months ago

CBSE > Class 11 > History

3 answers

Rani Mishra ??? 5 years, 3 months ago

Thanks

0Thank You

Gaurav Seth 5 years, 6 months ago

Olympiodorus was a writer, an historian and an ambassador in the early fifth century

0Thank You

Lucifer?? Morningstar?? 5 years, 6 months ago

Olympiodorus the Younger was a Neoplatonist philosopher, astrologer and teacher

0Thank You

ANSWER

Give two main features of ancient Roman religion

Posted by Rani Mishra ??? 5 years, 6 months ago

CBSE > Class 11 > History

1 answers

Lucifer?? Morningstar?? 5 years, 6 months ago

Early forms of the Roman religion were animistic in nature, believing that spirits inhabited everything around them, people included. The first citizens of Rome also believed they were watched over by the spirits of their ancestors.

0Thank You

ANSWER

bumper production boon or bane for farmers project

Posted by Priyanka Sharma 5 years, 6 months ago

CBSE > Class 11 > Economics