A magnetic field of flux densiity $$1.0 \mathrm{~Wb} \mathrm{~m}^{-2}$$ acts normal to a 80 turn coil of $$0.01 \mathrm{~m}^2$$ area. If this coil is removed from the field in $$0.2 \mathrm{~s}$$, then the emf induced in it is

The physical quantity which is measure in the unit of wb $$\mathrm{A}^{-1}$$ is

The current following through an inductance coil of self-inductance $$6 \mathrm{~mH}$$ at different time instants is as shown. The emf induced between $$t=20 \mathrm{~s}$$ and $$t=40 \mathrm{~s}$$ is nearly

A rod of length $$2 \mathrm{~m}$$ slides with a speed of $$5 \mathrm{~ms}^{-1}$$ on a rectangular conducting frame as shown in figure. There exists a uniform magnetic filed of $$0.04 \mathrm{~T}$$ perpendicular to the plane of the figure. If the resistance of the rod is $$3 \Omega$$. The current through the rod is