$A$ compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It
- AWill stay in north-south direction only
- BWill stay in east-west direction only
- CWill stay in any position
- DWill become rigid showing no movement
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Fill in the blanks:
$(i)$ The declination is ...... at higher latitudes.
$(ii)$ The declination in India is ...... .
$(i)$ The declination is ...... at higher latitudes.
$(ii)$ The declination in India is ...... .
Medium
View SolutionAssertion : The true geographic north direction is found by using a compass needle.
Reason : The magnetic meridian of the earth is along the axis of rotation of the earth.
Reason : The magnetic meridian of the earth is along the axis of rotation of the earth.
Let $m$ and $r$ be the dipole moment and radius of the Earth, respectively. Then, the Earth's magnetic field at the equator is
The Earth's magnetic field at the equator is approximately $0.4 \, G$. Calculate the Earth's magnetic dipole moment (nearly). (Radius of Earth $R = 6.4 \times 10^6 \, m$)
Medium
View SolutionThe angle of dip at a certain place on earth is $60^{\circ}$ and the magnitude of earth's horizontal component of magnetic field is $0.26 \, G$. The magnetic field at the place on earth is.....$G$
Medium
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