(i) How will the magnetic field around a current carrying straight conductor be affected on : (a) increasing the current through the conductor ? (b) changing the direction of flow of current in the conductor ? (ii) Describe an activity with diagram to draw magnetic field lines due to a current carrying circular loop.
(iii) State the rule used to find the direction of magnetic field due to a current carrying circular loop.
(i) How will the magnetic field around a current carrying straight conductor be affected on : (a) increasing the current through the conductor ? (b) changing the direction of flow of current in the conductor ? (ii) Describe an activity with diagram to draw magnetic field lines due to a current carrying circular loop.
(iii) State the rule used to find the direction of magnetic field due to a current carrying circular loop.
(i)
(a) On increasing the current through the conductor the strength of magnetic field will increase.
Explanation: The strength of the magnetic field at a distance r from a current carrying conductor is given by the relation:
B = (μo/2π)I/r.
So increasing the current will increase the magnetic field strength.
(b) Reversing the direction of current will reverse the direction of the magnetic field.
Explanation: By right hand thumb rule if we reverse the direction of the current out thumb too will point opposite and hence the direction of the fingers will also change to opposite
(i)
(a) On increasing the current through the conductor the strength of magnetic field will increase.
Explanation: The strength of the magnetic field at a distance r from a current carrying conductor is given by the relation:
B = (μo/2π)I/r.
So increasing the current will increase the magnetic field strength.
(b) Reversing the direction of current will reverse the direction of the magnetic field.
Explanation: By right hand thumb rule if we reverse the direction of the current out thumb too will point opposite and hence the direction of the fingers will also change to opposite
