A square conducting loop is placed near an in | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The magnetic field $B$ at a distance $x$ from an infinitely long wire carrying current $I$ is given by $B = \frac{\mu_0 I}{2 \pi x}$.As the curren

Vedclass · Accepted Answer

move towards the wire

Vedclass · Answer

(B) The magnetic field $B$ at a distance $x$ from an infinitely long wire carrying current $I$ is given by $B = \frac{\mu_0 I}{2 \pi x}$.As the current $I$ in the wire is suddenly halved, the magnetic flux $\phi$ linked with the square loop decreases.According to Lenz's law, the induced current in the loop will flow in such a direction as to oppose this decrease in magnetic flux. This means the induced current will create a magnetic field in the same direction as the original magnetic field.For this to happen, the induced current in the loop must flow in the clockwise direction.Now, consider the forces on the sides of the loop:$1$. The side of the loop closer to the wire (let's call it $CD$) carries current in the same direction as the main wire. Thus, it experiences an attractive force $F_{CD}$ towards the wire.$2$. The side of the loop farther from the wire (let's call it $AB$) carries current in the opposite direction to the main wire. Thus, it experiences a repulsive force $F_{AB}$ away from the wire.Since the magnetic field is stronger closer to the wire, the attractive force on the closer side is greater than the repulsive force on the farther side $(F_{CD} > F_{AB})$.Therefore, the net force on the loop is directed towards the wire, and the loop will move towards the wire.

$A$ 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 .......".

Similar Questions

In the arrangement shown in the given figure,the current from $A$ to $B$ is increasing in magnitude. The induced current in the loop will

$A$ conducting loop of radius $\frac{10}{\sqrt{\pi}}\,cm$ is placed perpendicular to a uniform magnetic field of $0.5\,T$. The magnetic field is decreased to $zero$ in $0.5\,s$ at a steady rate. The induced emf in the circular loop at $0.25\,s$ is:

Consider a magnet surrounded by a wire loop with an on/off switch $S$ as shown in the figure. If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit? Explain.

The magnetic flux through a circuit of resistance $R$ changes by an amount $\Delta \phi$ in time $\Delta t$. Then the total quantity of electric charge $Q$ which is passing during this time through any point of the circuit is given by:

$A$ conducting ring is placed around the core of an electromagnet as shown in the figure. When key $K$ is pressed,the ring

Vedclass Test Series

Exam Paper Generator

Online Exam Module