A rod of length l rotates with a small but uniform angular velocity ω about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the two ends of the rod is

Question

A rod of length l rotates with a small but uniform angular velocity ω about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the two ends of the rod is (A) zero (B) (1/2)ω Bl2 (C) ω Bl2 (D) 2ω Bl2

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/74c02395af7b3836880579d45538cef0-.png" /> Induced emf is generated between centre and end, and at two end. Potential will be same, hence, no potential difference is produced.

Q. A rod of length $l$ rotates with a small but uniform angular velocity $ω$ about its perpendicular bisector. A uniform magnetic field $B$ exists parallel to the axis of rotation. The potential difference between the two ends of the rod is

zero

$\frac{1}{2} ω B l^{2}$

$ω B l^{2}$

$2 ω B l^{2}$

Induced emf is generated between centre and end, and at two end. Potential will be same, hence, no potential difference is produced.

Q. A rod of length l rotates with a small but uniform angular velocity ω about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the two ends of the rod is

zero

21​ωBl2

ωBl2

2ωBl2

Induced emf is generated between centre and end, and at two end. Potential will be same, hence, no potential difference is produced.

Q. A rod of length $l$ rotates with a small but uniform angular velocity $ω$ about its perpendicular bisector. A uniform magnetic field $B$ exists parallel to the axis of rotation. The potential difference between the two ends of the rod is

$\frac{1}{2} ω B l^{2}$

$ω B l^{2}$

$2 ω B l^{2}$