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

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

Ask Question

derive lens maker formula for convex lens

Posted by Anand Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Explaination of lenz's law?

Posted by Sahil Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is it true a coil is placed in uniform B have net force is zero and ptove that is equal m×B

Posted by Vinti Chaudhary 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Vansh Goyal 7 years, 1 month ago

In electrostatic if q charge is kept in electric field e then it experience force f F=qe Similarly when a magnetic pole(m) is kept in magnetic field thwn it experience force f F=mB Q replaced by m and. E replaced by B

1Thank You

ANSWER

electreice field due to point charge

Posted by Danish Gour 5 years, 5 months ago

CBSE > Class 12 > Physics

1 answers

Rocky Choudhary 7 years, 1 month ago

E = KQ / R^2

0Thank You

ANSWER

The 2 condensers each of capacity 2uF are connected in parallel and 3 such combinations are connected in series.find resultant capacity of combination

Posted by R T 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shekhar Gurjar 7 years, 1 month ago

1Thank You

Shekhar Gurjar 7 years, 1 month ago

C=4/3

0Thank You

ANSWER

find the electric field on a axial line of an electric dipole

Posted by Kusal Thakur 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Satyam Chimaniya 7 years, 1 month ago

NCERT किताब में मिल जाता है कि वह अपने आप को यह भी कहा कि इस तरह की कोई बात नहीं है

1Thank You

Chandra Sree Gandhavarapu 7 years, 1 month ago

Physics ncert textbook pgno-27&28

0Thank You

ANSWER

Studends ka rahe c ke physic da final paper paper out of syllabus aunda ga is it right

Posted by Gurmeet Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Gaurav Tiwari 7 years, 1 month ago

1Thank You

ANSWER

Write condition of sensitive galvanometer

Posted by Khushi Sen 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is locus?In wavefront.

Posted by Akshay Satish 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Two positive points charges of 4c and 1c are situated at a distance of 3 meter of each other. Where should a third positive charge of 1c must be placed on the line joining the two so that it remains unaffected?

Posted by Ashish Kacktwan 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Abhishek Kumar Sinha 2 years, 6 months ago

For making this numerical we take + Unity charge

13Thank You

ANSWER

Krichoffs law

Posted by Krishna Awasthi 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Umang Jain 7 years, 1 month ago

Kirchoffs give two law 1.function rule or node rule or kcl - the total sum of incoming current at any node will be equal to the sum of outgoing current . 2.loop rule or kvl - the sum of total emf of the closed circuit should be equal to the sum of voltage drop across circuit element.

0Thank You

ANSWER

Marks distribution for board exam for physics

Posted by Rahil Behlim 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

direction of magnetic field in torque

Posted by Akash Yadav 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

As we know that the mgnet attracts only some of the things on the earth and also when magent is align with a thread then the magnet align itself in a particular direction but when a pencil which is not even attracted by the magnet align itself tooo so why the happens

Posted by Diksha Sharma 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Abhishek Kumar Sinha 7 years, 1 month ago

Since Earth is also a magnet hence it align the pencil towards itself

2Thank You

ANSWER

Why the equipotential surfaces about a single charge are not equidistant?

Posted by Robert Longjam 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Practical application of electrostatic shielding

Posted by Robert Longjam 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Emf=3v I=2A Two resistance =2ohm And second is 1ohm. find potential difference.

Posted by Mohini Rana 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is it true that we can't use pencil to draw diagrams in 12 board?

Posted by Kartik Verma 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Kalai Arasi 7 years, 1 month ago

No it is not like that for drawing we must only pencil

2Thank You

ANSWER

We know that magnetic field is originated from moving charges So how earth has a magnetic field . I want to know its moving charges origin

Posted by Surya Prakash Nagbanshi 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

why earth's behaves like a magnet ? Give reason.

Posted by Ravi Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amandeep Kumar 7 years, 1 month ago

Due presence of moving charge in earth.. Magnetic field are produced... Hence earth's behaves like a magnet

5Thank You

ANSWER

Derive capacitance

Posted by Adityaख़ासाअ Anand25 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Amit Dubey 7 years, 1 month ago

Charge bearing capacity of particle.

1Thank You

ANSWER

A concave lens of refractive index 1.5 is immersed in a medium of refractive index 1.65. What is the nature of the lens ?

Posted by Ayush Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

a concave lens of refractive index 1.5 is immersed

Posted by Ayush Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which type of radiation will be most effective for emission of electrons

Posted by Kapil Khatri 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Hello i am new here . I want to make notes of physics numericals of class 12 of chapter current electricity but i am not able to decide which numericals should i put in notes anybody help plzplz

Posted by Abhat Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Abhat Singh 7 years, 1 month ago

Am asking for imp nunericals not topics

1Thank You

Khushi Mondal 7 years, 1 month ago

(a) Relation between i and Vd in Conductor (b) Balanced Wheatstone Bridge (c) Combination of resistors Parallel combination Series combination (d) Battery and EMF(Electro Motive Force) (e)KIRCHOFF's Law Different Measuring Instrument Galvanometer Ammeter Voltmeter Wheatstone Bridge Meter Bridge Potentiometer -_-These are important topics in Board and Competitive exams

1Thank You

ANSWER

Point charge

Posted by Devendra Choudhary 7 years, 1 month ago

CBSE > Class 12 > Physics