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A glass convex lens has a power 10.D when immersed in a liquid it acts as a concave lens of focal length 50cm calculate the refractive index of liquid??

Posted by Saumya Agrawal 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Name the mirror having no spherical aberration

Posted by Saumya Agrawal 7 years, 3 months ago

CBSE > Class 12 > Physics

2 answers

Ash Ash 7 years, 3 months ago

Use parabolic mirror

Princesses Kaur 7 years, 3 months ago

???????

ANSWER

How can the whole charge of a conductor be transferred to another isolated conductors??

Posted by Saumya Agrawal 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Do electrons move in parabolic motion only if electric field applied is perpendicular to the motion of electrons?

Posted by Samriddhi Udaywal 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is cyclotrone ?

Posted by Shiv Dixit 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Princesses Kaur 7 years, 3 months ago

It is a device use to accerated the charge particle

ANSWER

Graph b/w v/I in electric dipole

Posted by Neha Singh 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How earth 's magnetic field can be ignored?

Posted by Siva Dasan 7 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Tanveer Raza 7 years, 3 months ago

Due to it's extremely low magnitude comparative to bar magnet we use in experiment s

ANSWER

Plane mirrors form either real or virtual image

Posted by Saumya Agrawal 7 years, 3 months ago

CBSE > Class 12 > Physics

3 answers

Ritu Singh 7 years, 3 months ago

It always form virtual image

Chirag Solanki 7 years, 3 months ago

lateral image formed by plane mirror is virtual and errect as we see our self eerect

but longitudinal image formed by plane mirror is real and inverted side by side inverted

that means if you rise your left hand in front of mirror the right hand of your image will rise

Ashish Kumar 7 years, 3 months ago

Virtual image because image form inside the mirror

ANSWER

A straight wire carrying currentof 12 ampere is bent into the semicircular arc of radius 2cm consider the magnetic field at centre of the arc? (1)- what is magnetic field due to the straight segments ? (2)- in what the contribution to magnetic field from the semicircle differs from that of a circular loopand in what way does it resemble? (3)- would ur amswer be different if the wire where it bent into a semicircle arc of the same radius but in the opposite way.

Posted by Deepika Dahiya 7 years, 3 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Focal length

Posted by Magilal Saran 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Saumya Agrawal 7 years, 3 months ago

And the distance between pole and focus is called focal length.

Saumya Agrawal 7 years, 3 months ago

A point on principle axis from where parallel beam of light passes or appear to be passed is called focus

ANSWER

What is lorenz force?Explain with example?

Posted by Manish Gupta 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Anushka Mishra 7 years, 3 months ago

When a charge is moving in a magnetic field,then a force is acted upon it.This force is known as Lorentz force.

Bharvi Dani 7 years, 4 months ago

The sum of magnetic and electrical force is lorentz force. Its always 0.

ANSWER

The energy of charged particles moving in a uniform magnetic field doesn't change or why

Posted by Kajal Vashist 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Manish Yadav 7 years, 3 months ago

as a charge particle moves perlendicular to the magnetic field so if we use the formula work = force × displacement × cos Q as above strated so angle between chage particle and magnetic field is 90 and cos 90 = O. so there is no work done in moving a charge particle

ANSWER

Which physical quantity has unit wb/m2 or it scalar or vector

Posted by Kajal Vashist 7 years, 4 months ago

CBSE > Class 12 > Physics

4 answers

Manish Yadav 7 years, 3 months ago

magnetic field has unit wb/m2 or T it is a vector quantity

Bharvi Dani 7 years, 4 months ago

Sorry tesla ×metre square since Phi=B.A

Bharvi Dani 7 years, 4 months ago

Magnetic flux has the unit weber It should be tesla per metre square i.e the another unit for magnetic flux.

Ashish Shrivas 7 years, 4 months ago

Magnetic field /scaler

ANSWER

What type of magnetic material is used for making permanent magnets

Posted by Kajal Vashist 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Kanchan Lata 7 years, 4 months ago

Ferragnetic substances are used for making permanent magnets.

Kanchan Lata 7 years, 4 months ago

Soft iron

ANSWER

Q factor

Posted by Ramdeep Kaur 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Ray Optics full chapter important questions?

Posted by Raja Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Shipu Kumar 7 years, 4 months ago

All ncert questions except 1

ANSWER

What is real meaning of electrostatic force

Posted by Rajan Gupta 7 years, 4 months ago

CBSE > Class 12 > Physics

2 answers

Shivani Gupta 7 years, 3 months ago

Electrostatic force means the force b/w two charged partice when are in rest

Prajyot Palimkar 7 years, 4 months ago

Force between the charges

ANSWER

moving coil galvanometer introduction, principle, construction, working, mathematics

Posted by Anil Kashyap 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

I-v graph for two identical conductors of different materials a and b is shown in the figure which one of the two has higher resistivity

Posted by Chhavi Chaudhary 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A square coil opqr

Posted by Smaira Arora 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate protonic charge in 100cc of water

Posted by Jyoti Singh Rajput 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Divya Dharshini 6 years ago

1cc=1gm for water as density =1gm/cm^3
Now no.of atoms in 18gm=6.023×10^23 and each molecule of water contains 10 protons (8 of oxygen+2of H2)
So no.of proton in 100gm water =(6.023×10^23×100÷18)×10
=3.3×10^25
Hence protonic charge
=3.3×10^25×1.6×10^-19
=5.4×10^6

ANSWER

An n sided polygon made of identical wires of length x carries a current I. Calculate the field at its centre.

Posted by Shaily Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Physics important question in CBSE board 2018 This year

Posted by Son U Behera 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Saraswati Bhrama 7 years, 4 months ago

Text book and S. L Arora

ANSWER

In which direction Earth is revolving

Posted by Ganeshan Chavan 7 years, 4 months ago

CBSE > Class 12 > Physics

3 answers

Piyush Bhatt 7 years, 4 months ago

West to east

Avinash Avi 7 years, 4 months ago

East to west

Lipak Mohapatra 7 years, 4 months ago

Anticlockwise direction i.e from east to west.

ANSWER

What is newton second law of motion

Posted by Karuna Nidhi 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Nikhil Kumar Singh 7 years, 4 months ago

The acceleration of an object is dependent upon two variables - the net force acting on it and the mass of object

ANSWER

What is momentum ???

Posted by Sandil Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Gurleen Kaur 7 years, 4 months ago

It is the product of mass of a body and its velocity......i.e. p=mv

ANSWER

a 600 pf capacitor is charged by 200v supply. it is then disconnected from the supply & is connected to another uncharged 600 pf capacitor. how much electrostatics energy is lost in the process.

Posted by Arpan Shivam Raliha 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which is the best book for physics?

Posted by Suhani C 7 years, 4 months ago

CBSE > Class 12 > Physics

5 answers

Nikhil Kumar Singh 7 years, 4 months ago

Hc Verma

Shivam Patel 7 years, 4 months ago

All in one is best and simply define

Rhitika Rai 7 years, 4 months ago

kumar mittal

Unnati Verma. Unnati Verma. 7 years, 4 months ago

S.L.arora. I have it

Shoaib Malik 7 years, 4 months ago

S.L. ARORA & DINESH.CO

ANSWER

What is the Volume of Prism?

Posted by Mayank Singh 7 years, 4 months ago

CBSE > Class 12 > Physics

1 answers

Shivam Patel 7 years, 4 months ago

V=bh where b base and h is hight

ANSWER

What is the nature of trajectory of moving point in uniform magnetic field?

Posted by Akash Bhangi 7 years, 4 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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