Question

$A$ and $B$ are two conductors carrying a current $i$ in the same direction. $x$ and $y$ are two electron beams moving in the same direction.

• A. There will be attraction between $A$ and $B$ and repulsion between $x$ and $y$.
• B. There will be attraction between $A$ and $B$ and also between $x$ and $y.$
• C. There will be repulsion between $A$ and $B$ and also between $x$ and $y.$
• D. There will be repulsion between $A$ and $B$ and attraction between $x$ and $y$.

Answer 1

The correct option is A There will be attraction between $A$ and $B$ and repulsion between $x$ and $y$.

• Force between the parallel current carrying conductors is given as

$F=\frac{\mu }{4\pi }\times \frac{2I_1{I}_{2}l}{a}$

• Two parallel currents attract each other and two anti-parallel repel each other from Fleming’s left-hand rule.
• Electronic repulsion between two electron beams will be more than magnetic attraction. So, two electron beams repel each other.

Hence, option $\left(b\right)$ is correct