Magnetic Properties of Matter — CBSE Class 12 board PYQs
32 past board questions on Magnetic Properties of Matter, arranged like the paper itself — objective first, long answers last, newest year first in each section. Open any question for its complete solution.
Multiple Choice2 Qs
Very Short Answer14 Qs
- The magnetic field and angle of dip at a place on the earth are and , respectively. The value of the vertical component of the earth's magnetic field at the place is ____.CBSE 2020View solution →
- At a place, the horizontal component of the earth's magnetic field is and the angle of dip is . What is the value of the horizontal component of the earth's magnetic field at the (magnetic) equator?CBSE 2017View solution →
- The horizontal component of the earth's magnetic field at a place is and the angle of dip is . What is the value of the vertical component of the earth's magnetic field there?CBSE 2012View solution →
- The permeability of a magnetic material is . Name the type of magnetic material it represents.CBSE 2011View solution →
- The susceptibility of a magnetic material is . Name the type of magnetic material it represents.CBSE 2011View solution →
- The susceptibility of a magnetic material is . Name the type of magnetic material it represents.CBSE 2011View solution →
- The susceptibility of a magnetic material is . Name the type of magnetic material it represents.CBSE 2011View solution →
- Where on the surface of Earth is the angle of dip 90?CBSE 2011View solution →
- When two materials are placed in an external magnetic field, the behaviour of magnetic field lines is as shown in the figure. Identify the magnetic nature of each of these two materials.CBSE 2009View solution →
- Define the term 'magnetic declination'.CBSE 2009View solution →
- Why should the material used for making permanent magnets have high coercivity?CBSE 2007View solution →
- Steel is preferred for making permanent magnets whereas soft iron is preferred for making electromagnets. Give one reason.CBSE 2006View solution →
- The vertical component of Earth's magnetic field at a place is times the horizontal component. What is the value of angle of dip at this place?CBSE 2006View solution →
- Write the S.I. unit of
(i) magnetic pole strength,
(ii) magnetic dipole moment of a bar magnet.CBSE 2003View solution →
Short Answer16 Qs
- (a) State Gauss's law for magnetism. Explain its significance.
(b) Write the four important properties of the magnetic field lines due to a bar magnet.CBSE 2019View solution → - Write three points of difference between para-, dia- and ferro-magnetic materials, giving one example for each.CBSE 2019View solution →
- A bar magnet of magnetic moment is aligned at with a uniform external magnetic field of . Calculate (a) the work done in turning the magnet to align its magnetic moment (i) normal to the magnetic field, (ii) opposite to the magnet …CBSE 2018View solution →
- (a) An iron ring of relative permeability has windings of insulated copper wire of turns per metre. When the current in the windings is , find the expression for the magnetic field in the ring.
(b) The susceptibility of a magnetic material is . Identify the …CBSE 2018View solution → - Depict the behaviour of magnetic field lines near
(i) diamagnetic and
(ii) paramagnetic substances. Justify, giving reasons.CBSE 2017View solution → - Show diagrammatically the behaviour of magnetic field lines in the presence of
(i) paramagnetic and
(ii) diamagnetic substances. How does one explain this distinguishing feature?CBSE 2014View solution → - The susceptibility of a magnetic material is . Identify the type of magnetic material and state its two properties.CBSE 2012View solution →
- A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip down at with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be . Determine the magnitude of the ea …CBSE 2011View solution →
- The horizontal component of the earth's magnetic field at a place is times its vertical component there. Find the value of the angle of dip at the place. What is the ratio of the horizontal component to the total magnetic field of the earth at that place?CBSE 2010View solution →
- The horizontal component of the earth's magnetic field at a place equals its vertical component there. Find the value of the angle of dip at that place. What is the ratio of the horizontal component to the total magnetic field of the earth at that place?CBSE 2010View solution →
- What are permanent magnets? What is an efficient way of preparing a permanent magnet? Write two characteristic properties of materials which are required to select them for permanent magnets.CBSE 2008View solution →
- If stands for the magnetic susceptibility of a given material, identify the class of materials for which:
(i)
(ii) ( stands for a small positive number).
(a) Write the range of relative magnetic permeability of these …CBSE 2008View solution → - Name three elements required to specify the earth's magnetic field at a given place. Draw a labelled diagram to define these elements. Explain briefly how these elements are determined to find out the magnetic field at a given place on the surface of Earth.CBSE 2008View solution →
- Write two characteristic properties to distinguish between diamagnetic and paramagnetic materials.CBSE 2005View solution →
- Define the terms 'Magnetic Dip' and 'Magnetic Declination' with the help of relevant diagrams.CBSE 2005View solution →
- A uniform magnetic field gets modified as shown below when two specimens X and Y are placed in it.
(i) Identify the two specimens X and Y.
(ii) State the reason for the behaviour of the field lines in X and Y.CBSE 2004View solution →