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CBSE - XII Science - Physics - Magnetism and Matter
Hi tell which option.only one option per question can be correct not two.
Asked by jain.pradeep
29th May 2019,
9:16 PM
CBSE - XII Science - Physics - Magnetism and Matter
What is the dimensional formula for permeability
Asked by Patalsur
7th February 2019,
4:40 AM
CBSE - XII Science - Physics - Magnetism and Matter
THE EARTH'S MAGNETIC FIELD AT THE EQUATOR IS APPOROXIMATELY 0.4G. ESTIMATE THE EARTH'S DIPOLE.
Asked by pardeepkumar2281
6th February 2019,
8:26 PM
CBSE - XII Science - Physics - Magnetism and Matter
Help me solve..
Asked by pksunilnair
5th December 2017,
7:00 PM
CBSE - XII Science - Physics - Magnetism and Matter
Name of a magnet whose two poles are not directly opposite to each other?
Asked by vasturushi
14th July 2017,
8:12 PM
CBSE - XII Science - Physics - Magnetism and Matter
What is Tangent Galvanometer? Explain briefly.
What are the possible conceptual questions from the chapter Magnetism & Matter?
Asked by debjyotisaha98
22nd August 2015,
12:11 PM
CBSE - XII Science - Physics - Magnetism and Matter
******What are the eleven dimension can i get enlisted them please.............and if sapce is vaccum the how things can travel in the space as i knew that in vaccum sound cannot travel means no medium is there .....sprry but i m not able to explain my question ...but hope you got it....
thanks for the help//////
thanks for the help//////
Asked by Atul
23rd June 2015,
2:44 PM
CBSE - XII Science - Physics - Magnetism and Matter
You have two similar magnets, judge which one is stronger without using another magnet.
Asked by Topperlearning User
1st June 2015,
3:32 PM
CBSE - XII Science - Physics - Magnetism and Matter
The susceptibility of a magnetic material is -2.6 x 10-5. Identify the type of magnetic meterial and state its two properties.
Asked by Topperlearning User
1st June 2015,
3:29 PM
CBSE - XII Science - Physics - Magnetism and Matter
(i) Write two characteristics of a material used for making permanent magnets. (ii) Why is core of an electromagnet made of ferromagnetic materials? Or Draw magnetic field lines when a (i) diamagnetic, (ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field lines due to the two substances?
Asked by Topperlearning User
1st June 2015,
3:27 PM
CBSE - XII Science - Physics - Magnetism and Matter
Define magnetic susceptibility of a material. Name two elements, one having positive susceptibility and the other having negative susceptibility. What does negative susceptibility signify?
Asked by Topperlearning User
1st June 2015,
3:26 PM
CBSE - XII Science - Physics - Magnetism and Matter
Why should the material used for making permanent magnets have high coercivity?
Asked by Topperlearning User
1st June 2015,
2:16 PM
CBSE - XII Science - Physics - Magnetism and Matter
Earth behaves as a magnet with magnetic poles approximately near the geographic poles. (a) The order of magnitude of earth's magnetic field in tesla is ____. (b) What do you understand by 'dynamo effect'? (c) Classify the following materials into diamagnetic and paramagnetic. (i) Lead (ii) Magnesium (iii) Tungsten (iv) Copper.
Asked by Topperlearning User
1st June 2015,
2:14 PM
CBSE - XII Science - Physics - Magnetism and Matter
The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents.
Asked by Topperlearning User
1st June 2015,
2:08 PM
CBSE - XII Science - Physics - Magnetism and Matter
(i) Write two characteristics of a material used for making permanent magnets. (ii) Why is core of an electromagnet made of ferromagnetic materials? 2 OR Draw magnetic field lines when a (i) diamagnetic, (ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field lines due to the two substances?
Asked by Topperlearning User
1st June 2015,
2:05 PM
CBSE - XII Science - Physics - Magnetism and Matter
In an ammeter (consisting of a galvanometer and a shunt) 0.5% of the main current passes through the galvanometer. Resistance of the galvanometer coil is G. Calculate the resistance of the shunt in terms of galvanometer resistance G. OR Define “intensity of magnetization” of a magnetic material. How does it vary with temperature for a paramagnetic materials ?
Asked by Topperlearning User
1st June 2015,
1:57 PM
CBSE - XII Science - Physics - Magnetism and Matter
The given figure shows a two wire concentric semi-circular loop carrying current I. O is the common centre of the semi-circles. What is the direction of the magnetic field at the centre O?
Asked by Topperlearning User
1st June 2015,
1:40 PM
CBSE - XII Science - Physics - Magnetism and Matter
Suppose we have a magnetic needle of length 2l with magnetic moment ‘M’ and pole strength ‘m’. We divide it into two pieces from the middle. What will be the magnetic moment and pole strength of the resultant pieces?
Asked by Topperlearning User
1st June 2015,
1:29 PM
CBSE - XII Science - Physics - Magnetism and Matter
The susceptibility of a magnetic material is -0.080.What is the type of material.
Asked by Topperlearning User
1st June 2015,
1:25 PM
CBSE - XII Science - Physics - Magnetism and Matter
Why do we prefer steel or alnico for making permanent magnets?
Asked by Topperlearning User
1st June 2015,
1:24 PM
CBSE - XII Science - Physics - Magnetism and Matter
What is Hysteresis Loop? What is its significance?
Asked by Topperlearning User
21st May 2015,
1:53 PM
CBSE - XII Science - Physics - Magnetism and Matter
What is Curie Temperature?
Asked by Topperlearning User
21st May 2015,
1:51 PM
CBSE - XII Science - Physics - Magnetism and Matter
Discuss briefly the characteristic of diamagnetic, paramagnetic and ferromagnetic materials. Also, give some examples of the three magnetic materials.
Asked by Topperlearning User
21st May 2015,
1:50 PM
CBSE - XII Science - Physics - Magnetism and Matter
What is the c.g.s unit of magnetic induction and magnetic intensity?
Asked by Topperlearning User
21st May 2015,
1:49 PM
CBSE - XII Science - Physics - Magnetism and Matter
In the given figure, two points p and Q are located at distance r and r' respectively from a bar magnet. Assume that the distance r is much greater than the length of the magnet. If r = 2r', then what is the ratio of magnitude of magnetic fields at P and Q?
Asked by Topperlearning User
21st May 2015,
1:24 PM
CBSE - XII Science - Physics - Magnetism and Matter
a cyclotron is not suitable to accelarate electrons why?
Asked by Sourav Jha
16th February 2015,
9:58 AM
CBSE - XII Science - Physics - Magnetism and Matter
THE DECLINATION AT A PLACE IS 20 DEGREE WEST IN WHAT DIRECTION SHIP BE STEEREDSO THAT IT REACHS GEOGRAPHIC NORTH EAST
Asked by Sandeep Yadav
7th February 2015,
6:09 PM
CBSE - XII Science - Physics - Magnetism and Matter
THE HORIZONTAL COMPONENT OF EARTH MEGNETIC FEILD IS 0.2 G AND TOTAL MEGNETIC FIELD IS 0.4GFIND THE ANGLE OF DIP
Asked by Sandeep Yadav
7th February 2015,
5:59 PM
CBSE - XII Science - Physics - Magnetism and Matter
how histerisis curve is useful in deciding particular type of magnets required for transformers etc?
Asked by Potam Mahesh
8th October 2014,
9:09 PM
CBSE - XII Science - Physics - Magnetism and Matter
Mam..,
I'd like to know y does a paramagnetic sample display greater magnetisation (for the same mag.field ) when cooled and the reason for diamagnetism to be almost independent of temperature.
Asked by MAANASI.M
13th September 2014,
10:58 PM
CBSE - XII Science - Physics - Magnetism and Matter
where can i find all the video lessons of the chapter magnetism and matter of class 12th physics? i am not able to fin video lesson on the topic hysterisis loop of that particular chapter..
Asked by Karishma
29th August 2014,
1:27 AM
CBSE - XII Science - Physics - Magnetism and Matter
Why do the north pole of the magnet is more powerful than the south pole of the magnet?
why do the suspended magnet always align in the north-south direction?
Asked by Pandurangarao
31st July 2014,
8:11 PM
CBSE - XII Science - Physics - Magnetism and Matter
A short bar magnet placed with its axis at 30 degrees with a uniform magnetic field of 0.35 T. A torque of 0.055 J is experienced by the magnet. Find the magnetic moment.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Magnetism and Matter
A magnetic needle with magnetic moment 3.8 X 10-2 JT-1 is placed at 30o with the uniform magnetic field. Suppose a torque of 6.8 X 10-4 J acts on it, then, find the magnetic field.
Asked by Topperlearning User
4th June 2014,
1:23 PM
