Draw a diagram to show the pattern of magnetic field lines on a horizontal sheet of paper due to a straight…
Draw a diagram to show the pattern of magnetic field lines on a horizontal sheet of paper due to a straight conductor passing through its centre and carrying current vertically upwards. Mark on it (i) the direction of current in the conductor and (ii) the corresponding magnetic field lines. State right hand thumb rule and check whether the directions marked by you are in accordance with this rule or not.
Solution
[Diagram: current-carrying straight conductor with concentric magnetic field loops, arrows showing direction of current and direction of magnetic field]
Direction of Current
Direction of magnetic field lines
Right-Hand Thumb Rule :
When a current-carrying straight conductor is being held in right-hand such that the thumb points towards the direction of current, then fingers will wrap around the conductor in the direction of the magnetic field lines.