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Abhishek
Subject: Physics
, asked on 4/2/18
(a) A small compass needle of magnetic moment 'm' is free to turn about an axis perpendicular to the direction of uniform magnetic field 'B'. The moment of inertia of the needle about the axis is 'I'. The needle is slightly disturbed from its stable position and then released. Prove that it executes simple harmonic motion. Hence deduce the expression for its time period.
(b) A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on th earth. Find out the values of (i) horizontal component of earth's magnetic field and (ii) angle of dip at the place.
Answer
1
Prerna Varshney
Subject: Physics
, asked on 1/2/18
Please do not give any link
(a) Derive the expression for the torque on a rectangular current carrying loop suspended in a uniform magnetic field.
(b) A proton and a deuteron having equal momenta enter in a region of uniform magnetic field at right angle to the direction of the field. Depict their trajectories in the field.
OR
(a) A small compass needle of magnetic moment 'm' is free to turn about an axis perpendicular to the direction of uniform magnetic field 'B'. The moment of inertia of the needle about the axis is 'I'. The needle is slightly disturbed from its stable position and then released. Prove that it executes simple harmonic motion. Hence deduce the expression for its time period.
(b) A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of (i) horizontal component of earth' s magnetic field and (ii) angle of dip at the place.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
Solve this:
Short answer type Question
Q.12. What do you mean by neutral points for a bar magnet placed in the geomagnetic field? What will be the positions of neutral points for the bar magnet with its (i) north pole pointing north, (ii) north pole pointing south? Show them with the help of suitable diagrams.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q.11. How is the horizontal component of earth's magnetic field related with the total intensity of earth's magnetic field and the angle of dip?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q. What are the elements of geomagnetism at a place? Define each of them.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q.9. Define three components of earth's magnetic field. Show them in a single diagram.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q. Define horizontal component of earth's magnetic field (H). Explain whether the value of H be the same everywhere on earth's surface?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q.7. At which places the values of the horizontal and vertical components of earth's magnetic field become equal?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q.6. Where on the earth's surface is the horizontal component of the earth's magnetic field maximum and where is it minimum?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q.5. At which places on earth's surface, the angles of dip are
90
°
a
n
d
0
°
?
Answer
2
Shubhrajyoti Ghosh
Subject: Physics
, asked on 30/1/18
No links please
Short answer type Question
Q. 4. 'Angle of dip at Kolkata is 31
°
N'. What do you mean by this statement?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 29/1/18
No links please
Q.11. What is Curie point?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 29/1/18
No links please
Q.10. Mentioning three properties, compare diamagnetic, paramagnetic and ferromagnetic materials.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 29/1/18
No links please
Q). What do you mean by diamagnetic materials? Describe its different properties.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 29/1/18
No links please
Short answer type Question
Q.5. What do you mean by paramagnetic materials? Describe its different properties.
Answer
1
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What are you looking for?
(b) A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on th earth. Find out the values of (i) horizontal component of earth's magnetic field and (ii) angle of dip at the place.
(a) Derive the expression for the torque on a rectangular current carrying loop suspended in a uniform magnetic field.
(b) A proton and a deuteron having equal momenta enter in a region of uniform magnetic field at right angle to the direction of the field. Depict their trajectories in the field.
(b) A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of (i) horizontal component of earth' s magnetic field and (ii) angle of dip at the place.
Short answer type Question
Q.12. What do you mean by neutral points for a bar magnet placed in the geomagnetic field? What will be the positions of neutral points for the bar magnet with its (i) north pole pointing north, (ii) north pole pointing south? Show them with the help of suitable diagrams.
Short answer type Question
Q.11. How is the horizontal component of earth's magnetic field related with the total intensity of earth's magnetic field and the angle of dip?
Short answer type Question
Q. What are the elements of geomagnetism at a place? Define each of them.
Short answer type Question
Q.9. Define three components of earth's magnetic field. Show them in a single diagram.
Short answer type Question
Q. Define horizontal component of earth's magnetic field (H). Explain whether the value of H be the same everywhere on earth's surface?
Short answer type Question
Q.7. At which places the values of the horizontal and vertical components of earth's magnetic field become equal?
Short answer type Question
Q.6. Where on the earth's surface is the horizontal component of the earth's magnetic field maximum and where is it minimum?
Short answer type Question
Q.5. At which places on earth's surface, the angles of dip are ?
Short answer type Question
Q. 4. 'Angle of dip at Kolkata is 31 N'. What do you mean by this statement?
Q.11. What is Curie point?
Q.10. Mentioning three properties, compare diamagnetic, paramagnetic and ferromagnetic materials.
Q). What do you mean by diamagnetic materials? Describe its different properties.
Short answer type Question
Q.5. What do you mean by paramagnetic materials? Describe its different properties.