$A$ coil having $1000$ turns and an area of $0.10 \ m^2$ rotates at half a revolution per second and is placed in a uniform magnetic field of $0.01 \ T$ perpendicular to the axis of rotation of the coil. The maximum emf voltage generated in the coil is . . . . . . $V$.

$A$ planar loop made of wire is rotating in a uniform magnetic field. At time $t=0$,the plane of the loop is perpendicular to the magnetic field. If the loop is rotating about an axis passing through its plane with a period of $10 \; s$,at which of the following times will the induced electromotive force (emf) be maximum and minimum,respectively?

In an $AC$ generator,a rectangular coil of $100$ turns each having area $14 \times 10^{-2} \, m^2$ is rotated at $360 \, rev/min$ about an axis perpendicular to a uniform magnetic field of magnitude $3.0 \, T$. The maximum value of the emf produced will be $............ \, V$. (Take $\pi = \frac{22}{7}$)

When a wire loop is rotated in a magnetic field,the direction of induced $emf$ changes in every

In a uniform magnetic field of induction $B$,a wire in the form of a semicircle of radius $r$ rotates about the diameter of the circle with angular frequency $\omega$. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is $R$,the mean power generated per period of rotation is

The number of turns in the coil of an $AC$ generator is $5000$ and the area of the coil is $0.25\,m^2$. The coil is rotated at the rate of $100\,cycles/sec$ in a magnetic field of $0.2\,Wb/m^2$. The peak value of the electromotive force $(EMF)$ generated is nearly......$kV$.