13. Two parallel wires P and Q placed at a separation of
6cm carry current 5A and 3A in opposite direction
respectively. Find the point on the line PQ where
resultant magnetic field is zero. What will happens if
current flows in same direction?
Answers
Answer:
4 cm away from P
Explanation:
Two parallel wires P and Q placed at a separation of
6cm carry current 5A and 3A in opposite direction
respectively. Find the point on the line PQ where
resultant magnetic field is zero.
Let say at a distance of d from Q the magnetic field is zero
then distance from P = 6 + d
Magnetic filed ∝ Current / Distance
Mangnetic field by P = k 5/(6+d) (k is Constant)
Magntic field by Q = k 3 /d
k 5/(6+d) = k 3 /d
=> 5d = 18 + 3d
=> 2d = 18
=> d = 9
9 cm away from Q & 15 cm away from P
if current flows in same direction then Magnetic field will in between P & Q will be zero
Let say at a distance of d from P the magnetic field is zero
then distance from Q = 6 - d
Magnetic filed ∝ Current / Distance
Mangnetic field by P = k 5/d (k is Constant)
Magntic field by Q = k 3 /(6-d)
k 5/d = k 3 /(6-d)
=> 6 (6-d) = 3d
=> 36 - 6d = 3d
=> 36 = 9d
=> d = 4
4 cm away from P towards Q
Answer:
Explanat4 cm away from P
Explanation:
Two parallel wires P and Q placed at a separation of
6cm carry current 5A and 3A in opposite direction
respectively. Find the point on the line PQ where
resultant magnetic field is zero.
Let say at a distance of d from Q the magnetic field is zero
then distance from P = 6 + d
Magnetic filed ∝ Current / Distance
Mangnetic field by P = k 5/(6+d) (k is Constant)
Magntic field by Q = k 3 /d
k 5/(6+d) = k 3 /d
=> 5d = 18 + 3d
=> 2d = 18
=> d = 9
9 cm away from Q & 15 cm away from P
if current flows in same direction then Magnetic field will in between P & Q will be zero
Let say at a distance of d from P the magnetic field is zero
then distance from Q = 6 - d
Magnetic filed ∝ Current / Distance
Mangnetic field by P = k 5/d (k is Constant)
Magntic field by Q = k 3 /(6-d)
k 5/d = k 3 /(6-d)
=> 6 (6-d) = 3d
=> 36 - 6d = 3d
=> 36 = 9d
=> d = 4
4 cm away from P towards Qion: