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प्रश्न
State any two properties of a magnet.
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उत्तर
Properties of a magnet:
- The freely suspended magnet always aligns itself in the geographic north and geographic south direction.
- Like poles of magnets repel each other while unlike poles attract.
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संबंधित प्रश्न
Explain why, a freely suspended magnet always points in the north-south direction.
Which of the following statements is incorrect regarding magnetic field lines?
(a) The direction of magnetic field at a point is taken to be the direction in which the north pole a magnetic compass needle points.
(b) Magnetic field lines are closed curves.
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.
If you hold a coil of wire next to a magnet, no current will flow in the coil. What else is needed to induce a current?
In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
A dry cell can supply a charge of 800 C. If continuous current of 8.0 mA is drawn, calculate the time in which cells will discharge completely.
Complete the following diagram of magnets to show the lines of force.
Distinguish between
Magnetic properties of iron and steel.
A charge moving in a magnetic field, in a direction other than the direction of the magnetic field, experiences a force. It is called the ______ force.
A wire 10 cm long carrying a current of 1.5 A is held in a uniform magneÑic field in which B = 10-3 T. Calculate the force on the wire if it is held perpendicular to the lines of the magnetic field.
