1Q: What is cork screw rule?
Ans: If a right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in the direction of current flow, the motion of its handle will indicate the direction of magnetic flux produced around the conductor.
2Q: What is right hand rule?
Ans: If a conductor is gripped by the right hand in such a way that the thumb remains in the direction of current flow then the fingers will represent the direction of magnetic flux produced around the conductor.
3Q: What type of magnetic field is formed by a current carrying conductor loop?
Ans: The magnetic field of a current carrying conductor loop is also composed of concentric lines of force, but in this case the lines of force get condensed inside the loop and rarified outside the loop.
4Q: What type of magnetic field is formed by a current carrying solenoid?
Ans: The magnetic field of a current carrying solenoid is identical to the magnetic field of a bar magnet. One end of the solenoid acts as north-pole and the other as south-pole.
5Q: What is end rule?
Ans: If on looking at any one end of a solenoid, the direction of current flow is found to be clockwise then the end under observation is a south-pole.
6Q: What is Helix rule?
Ans: If a solenoid is gripped by the right hand with the fingers pointing the direction of current flow, the outstreched thumb will then point the north-pole.
7Q: What is permeability?
Ans: The magnetic flux density produced by a magnetising force in a substance in comparison to that produced in air or vacuum is called the permeability of that substance.
8Q: What are the types of magnetic materials?
Ans: There are three types of magnetic materials:
(1) Ferro -magnetic: materials having a permeability of 200 to 1000, e.g. iron, steel etc.
(2) Dia -magnetic: materials having a permeability of less than 1, e.g. antimony, bismuth etc.
(3) Para -magnetic: materials having a permeability of slightly greater than 1, e.g. copper, aluminium etc.
9Q: What is meant by magnetic induction?
Ans: When a magnet is brought near to an iron bar or when iron bar is brought near to a magnet, a magnetism is produced in the iron bar. The phenomenon is referred as magnetic induction.
10Q: What is meant by the intensity of magnetic field?
Ans: The force acting on a unit pole placed in a magnetic field is called the intensity of magnetic field. It is denoted by letter H and its unit is Wb/m.
Ans: If a right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in the direction of current flow, the motion of its handle will indicate the direction of magnetic flux produced around the conductor.
2Q: What is right hand rule?
Ans: If a conductor is gripped by the right hand in such a way that the thumb remains in the direction of current flow then the fingers will represent the direction of magnetic flux produced around the conductor.
3Q: What type of magnetic field is formed by a current carrying conductor loop?
Ans: The magnetic field of a current carrying conductor loop is also composed of concentric lines of force, but in this case the lines of force get condensed inside the loop and rarified outside the loop.
4Q: What type of magnetic field is formed by a current carrying solenoid?
Ans: The magnetic field of a current carrying solenoid is identical to the magnetic field of a bar magnet. One end of the solenoid acts as north-pole and the other as south-pole.
5Q: What is end rule?
Ans: If on looking at any one end of a solenoid, the direction of current flow is found to be clockwise then the end under observation is a south-pole.
6Q: What is Helix rule?
Ans: If a solenoid is gripped by the right hand with the fingers pointing the direction of current flow, the outstreched thumb will then point the north-pole.
7Q: What is permeability?
Ans: The magnetic flux density produced by a magnetising force in a substance in comparison to that produced in air or vacuum is called the permeability of that substance.
8Q: What are the types of magnetic materials?
Ans: There are three types of magnetic materials:
(1) Ferro -magnetic: materials having a permeability of 200 to 1000, e.g. iron, steel etc.
(2) Dia -magnetic: materials having a permeability of less than 1, e.g. antimony, bismuth etc.
(3) Para -magnetic: materials having a permeability of slightly greater than 1, e.g. copper, aluminium etc.
9Q: What is meant by magnetic induction?
Ans: When a magnet is brought near to an iron bar or when iron bar is brought near to a magnet, a magnetism is produced in the iron bar. The phenomenon is referred as magnetic induction.
10Q: What is meant by the intensity of magnetic field?
Ans: The force acting on a unit pole placed in a magnetic field is called the intensity of magnetic field. It is denoted by letter H and its unit is Wb/m.
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