Area of a coil is $0.16 {\mathrm{m}}^2$. If the magnetic field through it changes from $0.1 \mathrm{Wb} {\mathrm{m}}^{-2}$ to $0.5 \mathrm{Wb} {\mathrm{m}}^{-2}$ in $0.02 \mathrm{s}$, then the emf induced in the coil will be 

An electron is moving near to a conducting loop then the induced current in the loop is-

A metallic conductor of $1 \mathrm{m}$ length is rotated in a vertical plane about its one end at an angular velocity of $5 \mathrm{rad} {\mathrm{s}}^{-1}$. If the horizontal component of the earth's field is $0.2\times {10}^{-4} \mathrm{T}$, the voltage generated between the ends of the conductor will be