MCQ
A conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if
  • A
    it is rotated about its axis
  • it is rotated about a diameter
  • C
    it is not moved
  • D
    it is given translational motion in the field

Answer

Correct option: B.
it is rotated about a diameter
b
An $emf$ is induced only when magnetic flux linked with the loop changes. This is possible when the loop is rotated about a diameter.

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

Similar questions

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is
In the figure shown, a particle is released from the position $A$ on a smooth track. When the particle reaches at $B$, then normal reaction on it by the track is .........
An alpha nucleus of energy $\frac{1}{2}mv^2$ bombards a heavy nuclear target of charge $Ze.$ Then the distance of closest approach for the alpha nucleus will be proportional to
The conductivity of a superconductor is
$\begin{array}{*{20}{c}}
  R \\ 
  H 
\end{array} > C = O\,\xrightarrow{{HS\,{{\rlap{-} (C{H_2}\rlap{-} )}_3}\,SH}}\,\xrightarrow[{n\, - \,BuLi}]{}$ $\xrightarrow{{{D_2}O}}\,\xrightarrow[{{H_2}O}]{{HgC{l_2}\,/\,CdC{O_3}}}$
Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance $2000 \,\Omega$ is used to measure the potential difference across $500 \,\Omega$ resister, the reading of the voltmeter will be ............... $V$
A ray of light is incident at the glass-water interface at an angle $i$, it emerges finally parallel to the surface of water, then the value of ${\mu _g}$ would be
Two identical capacitors, have the same capacitance $C$. One of them is charged to potential $V_1$ and the other to $V_2$. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is
When two soap bubbles of radii $a$ and $b ( b > a )$ coalesce, the radius of curvature of common surface is
In a region of uniform magnetic induction $B = {10^{ - 2}}\,tesla$, a circular coil of radius $30\, cm$ and resistance $\pi^2 \;ohm$ is rotated about an axis which is perpendicular to the direction of $B$ and which forms a diameter of the coil. If the coil rotates at  $200\, rpm$ the amplitude of the alternating current induced in the coil is.....$mA$