Consider the situation shown in the figure. T | vedclass

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

Question

(B) The induced electromotive force $(emf)$ in a moving conductor is given by $e = B l v$,where $B$ is the magnetic field,$l$ is the length of the con

Vedclass · Accepted Answer

Remain the same

Vedclass · Answer

(B) The induced electromotive force $(emf)$ in a moving conductor is given by $e = B l v$,where $B$ is the magnetic field,$l$ is the length of the conductor perpendicular to the velocity,and $v$ is the velocity.In this setup,the effective length $l$ of the wire that cuts the magnetic field lines is the distance between the two rails (the chord length of the wire).When the straight wire $AB$ is replaced by a semicircular wire with the same chord length,the effective length $l$ remains unchanged because the distance between the points of contact on the rails remains the same.Since $e = B l v$,and $B, l,$ and $v$ remain constant,the induced $emf$ remains the same.Consequently,the induced current $I = e / R$ also remains the same,assuming the resistance $R$ of the circuit does not change.

Consider the situation shown in the figure. The wire $AB$ is sliding on the fixed rails with a constant velocity $v$. If the wire $AB$ is replaced by a semicircular wire of the same chord length,the magnitude of the induced current will

Similar Questions

The anode mud in the electrolytic refining of silver contains

The refracting angle of a prism is $A$ and the refractive index of the material of the prism is $\cot(A/2)$. Then the angle of minimum deviation will be

$A$ parallel plate capacitor with a dielectric slab of dielectric constant $K$ between its plates has a capacitance $C$ and is charged to a potential $V$. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system is:

The truth table for the system of four $NAND$ gates as shown in the figure is:

$A$ torch bulb rated as $4.5\, W, 1.5\, V$ is connected as shown in the figure. The $e.m.f.$ of the cell needed to make the bulb glow at full intensity is ............. $V$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module