41.
Which of the following is responsible for the earth's magnetic field?
A
Convective currents in earth's core
B
Diversive current in earth's core.
C
Rotational motion of earth.
D
Translational motion of earth.
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Which of the following is responsible for the earth's magnetic field?
Convective currents in earth's core
Diversive current in earth's core.
Rotational motion of earth.
Translational motion of earth.
Which of the following property shows the property of ferromagnetic substances?
The ferromagnetic property depends on tem- perature.
The ferromagnetic property does not depend on temperature.
At high enough temperature ferromagnet becomes a diamagnet.
At low temperature ferromagnet becomes a paramagnet.