CBSE > Class 12 > Physics | CBSE Board | Homework Help

Antimatter refers to sub-atomic particles that have properties opposite normal sub-atomic particles. ... More specifically, the sub-atomic particles of antimatter have properties opposite those of normal matter. The electrical charge of those particles is reversed.

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Dimension of charge

Posted by Ishrat Fatima 6 years, 1 month ago

CBSE > Class 12 > Physics

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Aluminium is subjected to varying temperature .what is the effect lf temp on suscessbtability ??

Posted by Ayaan Ali ?? 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Mahi D 6 years, 1 month ago

No effect as it is paramagnetic and does not follow Curie's law.

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Topics removed from semiconductor chapter??

Posted by Ritwik Choudhary 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Mahi D 6 years, 1 month ago

Transistor , logic gates

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Ritwik Choudhary 6 years, 1 month ago

Can you please write the name of the topics the are removed?

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Shruti Joshi 6 years, 1 month ago

Only up to solar cells further are removed

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Mcq kaha se pade yrr?

Posted by Mansi Yadav 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Aditya Chauhan 6 years, 1 month ago

Yaa or if iu have any other refresher

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Tamanna Sharma 6 years, 1 month ago

Exemplar se

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Possible reason why water has a much greater dielectric constant than mica

Posted by Kashish Shukla 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Vaibhav Srivastava 6 years, 1 month ago

Water has a much dielectric constant necause water has high dipole moment. Therefore its polar nature is greater than mica.

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Shruti Joshi 6 years, 1 month ago

Water,due to its polar nature has a large dieletic constant .therefore Water molecules have very large Electric dipole movment And us forced to rotates its respond To alternates extrnal Electric field Mica on other hand is less polar than waterand hence it has low dielectric constant

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ELECTRIC FIELD OF A LINE CHARGE FROM COULOMB’S LAW

Posted by Rishav Raj 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Hardik Singh 6 years, 1 month ago

Lemda upon 2pie epsolon knot

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define the term intensity of radiation in terms of photon picture of light

Posted by Yashika Anand 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Mahi D 6 years, 1 month ago

Intensity is defined as the no. of photons falling per unit area per second.

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electromagnets are made of soft iron because..3 reasons

Posted by Sheenam Gupta 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Mahi D 6 years, 1 month ago

Because soft iron has high initial permeability so that magnetisation is large even for small magnetising field,low retentivity so that the magnetisation is lost as the magnetising current is switched off.

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Sheenam Gupta 6 years, 1 month ago

i want to know about its retentivity permiabiloty and cervivity

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Aditya Chauhan 6 years, 1 month ago

This is because soft iron has the property of losing its magnetism(or is able to be demagnetized) very quickly. An electromagnet works in this way: when current flows through it, it becomes magnetized, and immediately current stops flowing, it loses its magnetism. Hence, soft iron cores are the ideal material for this application

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Name the current which can flow even absence of electric charge?

Posted by Rain Drop 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Aditya Chauhan 6 years, 1 month ago

Even in absence of charge the current flown is called displacement current. Displacement current is due to the rate of change of the electric field. In cases where there is no conduction current but a time-varying electric field, only displacement current is present.

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Jaikishan Bajaj 6 years, 1 month ago

Eddy's current

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Principle of working of a meter bridge

Posted by Keshav Kumar Jha 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Jaikishan Bajaj 6 years, 1 month ago

Balanced wheat stone bridge

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Shikha Verma 6 years, 1 month ago

It works on the principle of wheat stone bridge where P/Q=R/S

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Is biot savart law obeys inverse square law

Posted by Shefu ??????? 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Vinay Gautam 6 years, 1 month ago

Yeh

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Shikha Verma 6 years, 1 month ago

Yes

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Aditya Chauhan 6 years, 1 month ago

Yaa it is The Biot Savart Law is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current. Biot–Savart law is consistent with both Ampere's circuital law and Gauss's theorem

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Electrostatic potential chapter notes

Posted by Ankit Raj 6 years, 1 month ago

CBSE > Class 12 > Physics

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What is half life

Posted by Mir Asrar Ul Haq 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aparna Sahoo 6 years, 1 month ago

The time interval in which half of the radioactive nuclei originally present in sample disintegrate is called half life

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How to Score 55/70 in Physics Board Exam Class 12

Posted by Saksham Chugh 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Priya Dharshini ? 6 years, 1 month ago

Why u want to score 55.. u can score 70 also if u do hard work and try ur best in exam... prepare all derivations and definitions and dimensional units and ncert solved examples and unsolved examples... otherwise solve past year papers atleast 20 u can score 60 above.. i am damn sure

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what is the sito unit of heat

Posted by Ambika Matwan 6 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shikha Verma 6 years, 1 month ago

Joule

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Ambika Matwan 6 years, 1 month ago

joul

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All derivations in chapter 1 class 12th

Posted by A.K Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Tamanna Sharma 6 years, 1 month ago

Easy

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How metre bridge is used to find the unknown resistance

Posted by Amal S M 6 years, 1 month ago

CBSE > Class 12 > Physics

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can i get all the derivations of electrostatics?

Posted by Akshad Shinde 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Tamanna Sharma 6 years, 1 month ago

From NCERT textbook

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Find charge on capacitor

Posted by Raja Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

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I have lots of problem in ray diagrams? So plz suggest me to reduce this problem

Posted by Pran Ranjan Kumar 6 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Mahesh M 6 years, 1 month ago

Die

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Tamanna Sharma 6 years, 1 month ago

Ya Rahul is right,only practice but in a smart way

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Rahul Kumar 6 years, 1 month ago

Practice as much questions as possible dont hesistate to give time to it.

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Imp topics in emw

Posted by Khushi Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ticola Dukanwala 6 years, 1 month ago

Apna fb ya insta bta de m request bhejta hu☺️

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What is the definition of angle of dip

Posted by Khushi Singh 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 1 month ago

Angle of dip / inclination (δ) :

The angle made between the total of earth’s magnetic field (B_e) with the surface of the earth (horizontal component) in the magnetic meridian is known as angle of dip.

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show mathematically that the potential at a point on the equatorial line of electric dipole is zero

Posted by Kunal Chaudhary 6 years, 1 month ago

CBSE > Class 12 > Physics

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Find the focal length of a given concave mirror by either plotting garphs between u and v or by calculations method

Posted by Jos Flo 6 years, 1 month ago

CBSE > Class 12 > Physics

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I wanna get 100 in physics .i had done evrything .but now i am facing a lot of problems In revision. Kindly please tell me how to revise evrything please. I don't know what s happening i dont remember anything .please help me guys.........

Posted by ▪▪Amrit▪▪ ❤ 6 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Aman Mundra 6 years, 1 month ago

For good revision; firstly read the theory of the chapter, try to understand it, make concepts such that they become easy to learn and understand and then try to solve numerical portion with using only your understanding and solve only NCERT because cbse doesn't give out of book, it only check our basic concept. When you end with a chapter then close book and try to remembering all topics and concepts you read in the chapter. This will enhance your understanding.

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Is communication system there or not in syllabus n what about logic gates?

Posted by Harshal Patil 6 years, 1 month ago

CBSE > Class 12 > Physics