Download App

Electromagnetic Induction — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
A conducting rod of length 2l is rotating with constant angular speed w about its perpendicular bisector. A uniform magnetic field $\vec B$ exists parallel to the axis of rotation. The e.m.f. induced between two ends of the rod is
  • A
    $\mathrm{B} \omega^{l^2}$
  • B
    $\frac{1}{2} \mathrm{~B} \omega^{l^2}$
  • C
    $\frac{1}{8} \mathrm{~B} \omega^{l^2}$
  • ✓
    Zero
✓

Answer

Correct option: D.
Zero
(d) Zero

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electromagnetic Induction→Electromagnetic Induction — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Consider the situation shown in figure. If the switch is closed and after some time it is opened again, the closed loop will show:
→
A particle of charge $q$ and mass $m$ starts moving from the origin under the action of an electric field $\vec E = {E_0}\hat i$ and $\vec B = {B_0}\hat i$ with velocity ${\rm{\vec v}} = {{\rm{v}}_0}\hat j$. The speed of the particle will become $2v_0$ after a time
→
In an experiment, the saturation in the plate current in a diode is observed at $240\,V$. But a student still wants to increase the plate current. It can be done, if
→
A battery of internal resistance one ohm and $emf$ $3\,volt$ sends a current through $1\,metre$ of uniform wire of resistance $5\,\Omega $. The pole of the cell of $emf$ $1.4\,volt$ are connected to two points on the wire so that no current passes through this cell. Then, the potential gradient of the wire is
→
Two spherical conductors $B$ and $C$ having equal radii and carrying equal charges in them repel each other with a force $F$ when kept apart at some distance. A third spherical conductor having same radius as that of $B$ but uncharged is brought in contact with $B$, then brought in contact with $C$ and finally removed away from both. The new force of repulsion between $B$ and $C$ is
→
Stars are twinkling due to
→
Two charges of $5 Q$ and $-2 Q$ are situated at the points $(3 a, 0)$ and $(-5 a, 0)$ respectively. The electric flux through a sphere of radius $4a$ having center at origin is
→
In Young's double slit interference experiment , the slit widths are in the ratio $1 : 25$. Then the ratio of intensity at the maxima and minima in the interference pattern is
→
Light from sodium lamp is passed through cold sodium vapours, the spectrum of transmitted light consists of
→
Highly energetic electrons are bombarded on a target of an element containing $30$ neutrons. The ratio of radii of nucleus to that of Helium nucleus is ${14^{1/3}}$. The atomic number of nucleus will be
→