A bar magnet is equivalent to
torroid carrying current
straight conductor carrying current
solenoid carrying curren
circular coil carrying current
The electrons in the beam of a television tube move horizontally from South to North. The vertical component of the earth's magnetic field points down. The electron is deflected towards
West
no deflection
East
North to South
Among the followmg properties describing diamagnetism identify the property that is wrongly stated :
Diamagnetic material do not have permanent magnetic moment
Diamagnetism is explained in terms of electromagnetic induction
Diamagnetic materials have a small positive susceptibility
The magnetic moment of individual electrons neutralize each other
Ferromagnetic materials used in a transformer must have
low permeability and high hysterisis loss
high permeability and low hysterisis loss
high permeability and high hysterisis loss
low permeability and low hysterisis loss
A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material ?
Diamagnetic
Paramagnetic
Ferromagnetic
Ferroelectric
Core of electromagnets are made of ferromagnetic material which has
low permeability and high retentivity
high permeability and low retentivity
low permeability and low retentivity
high permeability and high retentivity
An aircraft with a wingspan of 40 m flies with a speed of 1080 km/h in the Eastward direction at a constant altitude in the Northern hemisphere, where the vertical component of the Earth's magnetic field is 1.75 × 10-5 T. Then the emf developed between the tips of the wings is
0.21 V
0.5 V
2.1 V
0.34 V
The magnetic susceptibility of a paramagnetic material at -73°C is 0.0075 and its value at − 173°C will be
0.015
0.0045
0.0075
0.0030
and are susceptibility of a paramagnetic material at temperatures T1 K and T2 K respectively, then
At certain place, the horizontal component of Earth's magnetic field is 3.0 G and the angle dip at that place is 30°. The magnetic field of Earth at that location is
4.5 G
5.1 G
3.5 G
6.0 G
C.
3.5 G