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प्रश्न
The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
उत्तर
direction of current in electromagnet winding were reversed
In other options, the strength of magnetic field can change because the strength of magnetic field produced by a solenoid depends on number of turns, current and material of the core of the electromagnet.
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संबंधित प्रश्न
What are the two ways in which you can trace the magnetic field pattern of a bar magnet?
A magnetic field exerts no force on:
an electrical charge moving perpendicular to its direction
an unmagnetised iron bar
a stationary electric charge
a magnet
Explain the following :
The north end of a freely suspended magnetic needle gets attracted towards a piece of soft iron placed a little distance away from the needle.
In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earth's magnetic field alone.
What conclusion is drawn regarding the magnetic field at a point if a compass needle at that point rests in any direction? Give reason for your answer.
Draw diagram showing the arrangement of the lines of force for a single magnet.
What are the properties of a magnet?
Magnetic field lines determine ______.
The direction of the magnetic lines around a current-carrying conductor can be easily understood using the ______ rule.
