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Magnetic Field Free Doubts and Solutions

CBSE - XII Science - Physics - Magnetism and Matter

Why can't the south pole of the magnetic needle deflect in Ampere swimming Rule??  

Asked by pratishapranisha153 21st May 2019, 9:45 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Find  the magnitude and direction 

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Asked by alanpeter9611 1st March 2019, 12:44 AM
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CBSE - XII Science - Physics - Magnetism and Matter

A wire of length l is bent in the form of a circular loop with a no of turns and is suspended in a magnetic field of intensity B. Find the expression for the maximum torque produced on the circular loop when a current I is passed through it. 

Asked by mridulabarua05 20th February 2019, 5:08 PM
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CBSE - XII Science - Physics - Magnetism and Matter

MUST EVERY MAGNETIC CONFIGURATION HAVE NORTH POLE AND SOUTH POLE AND CAN WE THINK OF MAGNETIC FIELD CONFIGURATION WITH THREE POLES ?

Asked by pardeepkumar2281 6th February 2019, 8:24 PM
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CBSE - XII Science - Physics - Magnetism and Matter

A MAGNETISED NEEDLE IN A UNIFORM MAGNETIC FIELD EXPERIENCES A TORQUE BUT NO NET  FORCE. HOWEVER, AN IRON NAIL NEAR A BAR MAGNET EXPERIENCES A FORCE OF ATTRACTION IN ADDITION TO TORQUE. EXPLAIN  

Asked by pardeepkumar2281 6th February 2019, 8:21 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Cyclotron uses

Asked by gowthamig.907 24th January 2019, 2:40 PM
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CBSE - XII Science - Physics - Magnetism and Matter

If a proton , deutron and alpha particle are accelerated with same velocity .What is the radius if they enter in a constant magnetic field and, find the ratio of their momentum .
 

Asked by Ashish 22nd July 2017, 3:05 PM
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CBSE - XII Science - Physics - Magnetism and Matter

please explain dip angle

Asked by mj369295 22nd January 2016, 10:11 PM
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CBSE - XII Science - Physics - Magnetism and Matter

how does a dip circle measures the dip angle at a place?
 
also explain this statement:
 
the dip angle in a vertical plane perpendicular to magnetic meridian will 90 degrees. 
 
whyy?

Asked by devanshmalhotra2609 21st January 2016, 6:54 PM
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CBSE - XII Science - Physics - Magnetism and Matter

What is the direction of magnetic field at the given position A and why? And direction of current in the disk.

Asked by Today's 16th December 2015, 4:53 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Give reasons
a) A charged particle enters a uniform magnetic field in a direction perpendicular to the field always follow circular path ?

Asked by vinitapahel123 13th December 2015, 11:48 AM
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CBSE - XII Science - Physics - Magnetism and Matter

What is meant by crossed electric and magnetic fields? Under what condition a charged particle entering a crossed electric and magnetic fields passes undeflected?

Asked by vinitapahel123 12th December 2015, 4:51 PM
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CBSE - XII Science - Physics - Magnetism and Matter

The horizontal component of the earth's magnetic field at a place is B and angle of dip is 60o. What is the value of vertical component of earth's magnetic field at equator?

Asked by Topperlearning User 1st June 2015, 3:31 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Predict the direction of induced currents in metal rings 1 and 2 lying in the same plane where current I in the wire is increasing steadily.

Asked by Topperlearning User 1st June 2015, 3:31 PM
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CBSE - XII Science - Physics - Magnetism and Matter

The vertical component of Earth's magnetic field at a place is begin mathsize 11px style square root of 3 end style times the horizontal component. What is the value of angle of dip at this place?

Asked by Topperlearning User 1st June 2015, 2:15 PM
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CBSE - XII Science - Physics - Magnetism and Matter

A magnetic needle free to rotate in a vertical parallel to the magnetic meridian has its north tip down at 60° with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be 0.4 G. Determine the magnitude of the earth's magnetic field at the place.

Asked by Topperlearning User 1st June 2015, 2:09 PM
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CBSE - XII Science - Physics - Magnetism and Matter

If the Earth's existing magnetic field is considered due to a large, circular, current-carrying loop in the Earth's interior, then what is the plane in which the current-carrying loop lies and what is the direction of current in it?

Asked by Topperlearning User 1st June 2015, 1:49 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Define a bar magnet and draw its magnetic lines of force.

Asked by Topperlearning User 1st June 2015, 1:47 PM
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CBSE - XII Science - Physics - Magnetism and Matter

When a magnet is brought close to iron nails, the nails (streaking to it) rotate as well as translate. Why?

Asked by Topperlearning User 1st June 2015, 1:46 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Half of a circular loop of radius 1 m is placed in an external magnetic field of strength 1 T as represented in the given figure. What is the flux linked to the loop?

Asked by Topperlearning User 1st June 2015, 1:43 PM
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CBSE - XII Science - Physics - Magnetism and Matter

(i) How can we detect whether an unknown planet has magnetic field or not?(ii) A solenoid of length l, area of cross-section a, and number of tightly wound turns N carries current I. How big will the magnetic field in the solenoid be?

Asked by Topperlearning User 1st June 2015, 1:41 PM
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CBSE - XII Science - Physics - Magnetism and Matter

The given figure represents a simple frame of wire carrying current I. Calculate the magnetic field at the centre O.

Asked by Topperlearning User 1st June 2015, 1:39 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Explain why magnetic field is circular if current is straight?

Asked by Topperlearning User 1st June 2015, 1:39 PM
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CBSE - XII Science - Physics - Magnetism and Matter

A nickel bar magnet is heated to 500oC and then cooled in free space, which is devoid of any magnetic field. Will the bar retain magnetism?

Asked by Topperlearning User 1st June 2015, 1:35 PM
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CBSE - XII Science - Physics - Magnetism and Matter

Given the expression of a magnetic field at a point with position vector , produced because of a current element with current I, and length dl.

Asked by Topperlearning User 21st May 2015, 1:48 PM
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CBSE - XII Science - Physics - Magnetism and Matter

The vertical component of the Earth's magnetic field is times the horizontal component at a place. Whit is the angle of dip at that place? If the magnitude of the horizontal component is , then find the resultant field.

Asked by Topperlearning User 21st May 2015, 1:25 PM
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CBSE - XII Science - Physics - Magnetism and Matter

If N pole of bar magnet is towards Earth's geographical south pole.Then no. of neutral points is 
1.one
2.two
3.four
4.infinite
please tell how to calculate in detail
 

Asked by Kb Aulakh 20th April 2015, 5:04 PM
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CBSE - XII Science - Physics - Magnetism and Matter

DERIVATION OF TORQUE EXPERIENCED BY A CIRCULAR LOOP IN UNIFORM MAGNETIC FIELD?

Asked by ARUN S 3rd March 2015, 4:06 PM
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CBSE - XII Science - Physics - Magnetism and Matter

is source of magnetic field analogus to source of electric field

Asked by Anshu Chauhan 19th February 2015, 11:07 PM
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CBSE - XII Science - Physics - Magnetism and Matter

1.Que. A horizontal wire of length 0.05m carries a current of 5A.If the mass of the wire is 10mg, the minimum magnetic field required to support the weight of the wire is what?
 
 

Asked by Gunjan 14th November 2014, 12:12 PM
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CBSE - XII Science - Physics - Magnetism and Matter

what is the exact and experimental reason of earth magnetism?
why magnetic monopole is not possible? 

Asked by Kishujaiswal353 13th August 2014, 5:06 PM
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CBSE - XII Science - Physics - Magnetism and Matter

In earth magnetism, are geographic north and magnetic north on same side or on the opposite side??

Asked by Pragyashree Jain 5th August 2014, 12:17 PM
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CBSE - XII Science - Physics - Magnetism and Matter

I am asked to make a working model. Please suggest me a good working model.

Asked by shaktiisgreat000 2nd June 2014, 4:09 PM
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