Signup as a Tutor

As a tutor you can connect with more than a million students and grow your network.

Class XI-XII Tuition (PUC)

Science

Trending Questions and Lessons

Follow 0 Followers

Ask a Question

Feed

All

All

Lessons

Discussion

Answered 3 days ago CBSE/Class 12/Science/Chemistry Tuition/Class XI-XII Tuition (PUC)

Write the principle involved in the ‚??vapour phase refining‚?? of metals.

FREDDY

Converting metal into its volatile compound and later decomposing it to obtain pure metal.For this process the metal should be able to form a compound with the given reagent and the compund formed can be decomposed easily to obtain the pure metal. Eg : nickel , titanium
Answers 1 Comments
Dislike Bookmark

Answered 4 days ago CBSE/Class 12/Science/Physics Tuition/Class XI-XII Tuition (PUC)

Draw the pattern of magnetic field lines for a circular coil carrying current.

Diksha Marwaha

Tutor

A pair of conducting circular coils each having N turns, each carrying a current I, separated by a distance equivalent to the radius of the circular loops, produce a homogeneous magnetic field B in the mid-plane between the two circular coils. a = radius of the coilsa = separation between... read more

A pair of conducting circular coils each having N turns, each carrying a current I, separated by a distance equivalent to the radius of the circular loops, produce a homogeneous magnetic field B in the mid-plane between the two circular coils.

 
 
   
a = radius of the coils
a = separation between the coils
a/2 = distance to the mid-plane
B = magnetic field at the mid-plane
read less
Answers 1 Comments
Dislike Bookmark

Answered on 15 Feb CBSE/Class 12/Science/Physics Tuition/Class XI-XII Tuition (PUC)

Calculate the value of the angle of incidence when a ray of light incident on one face of an equilateral... read more
Calculate the value of the angle of incidence when a ray of light incident on one face of an equilateral glass prism produces the emergent ray, which just grazes along the adjacent face. Refractive index of the prism is root over 2. read less

Anand Kumar

Tutor

Answers 1 Comments
Dislike Bookmark

Looking for Class XI-XII Tuition (PUC)

Find best Class XI-XII Tuition (PUC) in your locality on UrbanPro.

FIND NOW

Answered 5 days ago CBSE/Class 12/Science/Physics Tuition/Class XI-XII Tuition (PUC)

State Lenz‚??s law. Explain, by giving examples that Lenz‚??s law is a consequence of conservation of energy.

Ramya

Primary Teacher

Lenz's Law states that, when you induce a current in a wire via a changing magnetic field, the current flows through the wire in such a direction so that its magnetic field opposes the change that produced the current. So, what happens when you induce a current by, say, moving a wire through a magnetic... read more

Lenz's Law states that, when you induce a current in a wire via a changing magnetic field, the current flows through the wire in such a direction so that its magnetic field opposes the change that produced the current.

So, what happens when you induce a current by, say, moving a wire through a magnetic field, is that you're converting mechanical energy (the energy of the wire's motion) into electrical energy (the energy carried by the induced current).

Lenz's Law ensures that the mechanical energy of the wire is reduced by the same amount of energy gained by the current. It does this by exerting a force on the wire opposing the wire's motion. This causes the wire to lose mechanical energy (its motion is impeded); it must do work against the induced magnetic field to generate current.

To make this a little more concrete, let's imagine a fictitious universe where Lenz's Law doesn't apply; i.e. a universe in which 

there's no force generated on the wire at all, despite the induced current.

In this fictitious universe, imagine that you give the wire one unit of mechanical energy. As the wire passes through a magnetic field, a current appears in the wire that also carries one unit of energy. But since no opposing force is generated, no mechanical energy is lost; the wire still has its original one unit of mechanical energy. Which means that the wire now has two units of total energy (one electrical; one mechanical). You've created energy from nothing!

In the real universe, Lenz's Law ensures that, if the electrical energy gained is one unit then the mechanical energy lost is also one unit, so that the net energy gain of the wire is zero. Energy is conserved.

read less
Answers 1 Comments
Dislike Bookmark

Answered on 02 Feb CBSE/Class 12/Science/Chemistry Tuition/Class XI-XII Tuition (PUC)

What is the role of t-butyl peroxide in the polymerization of ethene?

Sujoy D.

Tutor

It initiates a free radical attack on ethene.
Answers 4 Comments
Dislike Bookmark

Answered on 02 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Name the base change and the amino acid change, responsible for sickle cell anaemia.

Sujoy D.

Tutor

Base = ValineAcid = Glutamic acid.
Answers 4 Comments
Dislike Bookmark

Looking for Class XI-XII Tuition (PUC)

Find best Class XI-XII Tuition (PUC) in your locality on UrbanPro.

FIND NOW

Answered 5 days ago CBSE/Class 12/Science/Physics

Draw logic symbol of an OR gate and write its truth table.

Ramya

Primary Teacher

OR gate The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation. read more
OR gate
		
The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high.  A plus (+) is used to show the OR operation.
read less
Answers 1 Comments
Dislike Bookmark

Answered 6 days ago CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Give the scientific name of a plant which came to India as a contaminant with imported wheat and causes pollen allergy.

Suneel Yadav

Tutor

Carrot grass
Answers 2 Comments
Dislike Bookmark

Answered on 16 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

What kind of structures is formed at the end of microsporogenesis and megasporogenesis?

Ramya

Primary Teacher

The structure formed at the end of microsporogenesis is pollen grain(male gametophyte) The structure formed at the end of megasporogenesis is embryo sac(female gametophte).
Answers 1 Comments
Dislike Bookmark

Looking for Class XI-XII Tuition (PUC)

Find best Class XI-XII Tuition (PUC) in your locality on UrbanPro.

FIND NOW

Answered on 15 Feb CBSE/Class 12/Science/Biology Tuition/Class XI-XII Tuition (PUC)

Mention the function of non-histone protein.

Ramya

Primary Teacher

In chromatin, those protein which remain after the histone proteins are called non histone proteins. Scaffold proteins, DNA polymerase, heterochromatin protein 1 and polycomb are the non histone proteins. The Non histone proteins have three important roles in maintaining structure of chromosomes during... read more

In chromatin, those protein which remain after the histone proteins are called non histone proteins. Scaffold proteins, DNA polymerase, heterochromatin protein 1 and polycomb are the non histone proteins. The Non histone proteins have three important roles in maintaining structure of chromosomes during cell division. These are

(1) chromosome condensation 
(2) sister chromatid separation at the metaphase: anaphase transition and

(3) interaction between chromosomes and cytoskeletons during formation of mitotic spindles and cleavage furrow.

read less
Answers 1 Comments
Dislike Bookmark

About UrbanPro

UrbanPro.com helps you to connect with the best Class XI-XII Tuition (PUC) in India. Post Your Requirement today and get connected.

Overview

Questions 501

Total Shares  

Related Topics

Top Contributors

Connect with Expert Tutors & Institutes for Science

x

Ask a Question

Please enter your Question

Please select a Tag