a) Why two magnetic lines of force never intersect each other
b)A current carrying conductor (direction of current flow from west to east) is placed in a
uniform magnetic field(direction of magnetic field is from south to north), which way the
conductor will deflect? State the law associated with this.
Answers
Answer:
a) When current lines are meeting , if we put a compass in side those two lines , then the compass has to show to directions which is not possible
b) By using left hand rule , the deflection will be downwards
Diagram
N -
W-------------------E
- S
apply left hand rule by flemings
Answer:
a) The two magnetic field lines do not intersect each other because if they do it means at the point of intersect the compass needle is showing two different directions which is not possible.
b ) Magnetic Effects of Electric Current
A current carrying straight conductor is placed in east-west direction. What will be the direction of the force experienced by this conductor due to earth's magnetic field? How will this force get affected on:
(i) reversing the direction of flow of current?
(ii) doubling the magnitude of current?
The direction of earth’s magnetic field points from geographical south to geographical north. Given that, the current carrying straight conductor is placed in the east-west direction. Therefore, according to Fleming's left hand rule the current carrying conductor will deflect downwards.
(i) On reversing the direction of current, the conductor gets deflected in the upward direction. i.e., the direction of conductor reverses.
(ii) If the magnitude of current is doubled, it will result in doubling the magnitude of the force.