Question

Find out the arrow or arrows which give the direction of a magnetic field line.

• A. Arrow A only
• B. Arrow B only
• C. Arrow C only
• D. Arrows A and D
• E. Arrows B and E

Answer 1

The correct option is E Arrows B and E

Arrow $A$ shows , the direction of magnetic force experienced by a current carrying wire in a perpendicular magnetic field and it is given by Fleming's left hand rule .

Arrow $B$ shows,the direction of magnetic field lines ,from north pole to south pole.

Arrow $C$ shows, the direction of conventional current from positive terminal to negative terminal of the battery.

Arrow $D$ shows, the direction of repulsion force exerted by wire in circuit $X$ to the wire of $Y$ due to the fact that direction of current in both parallel wires is opposite.

Arrows $E$ shows ,the direction of magnetic field lines due to current carrying wire of circuit $X$ which is given by right hand thumb rule.