WBJEE · Physics · Magnetic Effects of Current
A square conducting loop is placed near an infinitely long current carrying wire with one edge parallel to the wire as shown in the figure. If the current in the straight wire is suddenly halved. which of the following statements will be true? "The loop will .......". 
- A stay stationary
- B move towards the wire
- C move away from the wire
- D move parallel to the wire
Answer & Solution
Correct Answer
(C) move away from the wire
Step-by-step Solution
Detailed explanation
As we know that, magnetic field due to a long wire at a distance \(x\) from it is given by \(B=\frac{\mu_{0} I}{2 \pi x},\) where, \(I\) is the current flowing through the wire \(\beta \propto I\) Magnetic flux associated with the square loop, \[ \phi \propto \beta \propto I \]…
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