DELHI SCHOOL TEACHERS FORUM
CLASS -12  PHYSICS   Lesson -5 (Magnetism and Matter) based on Class held on 28/08/2020.     Disclaimer : DSTF will not be responsible for any mistake in Test.
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To Download Deleted Syllabus of All subject Click this link  : https://myedudel.blogspot.com/2020/08/deleted-syllabus-xii-class-2020-21.html
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1.  The magnetic field induction at a point on the axial line of a short bar magnet is *
1 point
2.  The small angle between magnetic axis and geographic axis at a place is *
1 point
3.  What is the angle of dip at a place where horizontal and vertical components of earth's field are equal  to ? *
1 point
4. The core of earth crust is made of elements ? *
1 point
5. The earth behaves like a magnet with magnetic field pointing appox. from Geographic- *
1 point
6. Which of the following quantities is not used to specify earth's magnetic field ? *
1 point
7. At a place, the horizontal component of earth's magnetic field is B and the angle of dip is 60⁰. What is the value of horizontal component of earth's magnetic field at equator ? *
2 points
1.  Match the Column with correct formula. *
3 points
Captionless Image
C
A
B
Formula for Magnetic field at axil line due to current carrying loop having N turns is
Formula for Magnetic moment of a bar magnet
Formula for Magnetic moment of a current carrying loop having N turns
1.  Match the Column *
4 points
Magnetic Declination
Geographical Meridian
Magnetic axis
Magnetic Inclination (dip)
_______at any place is a vertical plane passing thourgh the geographical north and south poles of the earth
It is a straight line passing through the magnetic poles of the earth.
The angle between the horizontal component of earth's magnetic field and the earth's resultant magnetic field at a place is
The angle between the magnetic meridian and the geographic meridian at a place is
1.  Match the Column *
5 points
TRUE
FALSE
Magnetic Declination varies from place to place.
Geographical Meridian at any place is a vertical plane passing through the magnetic north and south poles of the earth.
Line drawn though places that have zero declination is called agonic
Magnetic Inclination is 0⁰ at the equator and 90⁰ at the poles
Lines drawn up on a map through places that have the same dip are called aclinic line.
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