A $$800$$ turn coil of effective area $$0.05$$ $$m2$$ is kept perpendicular to a magnetic field $$5$$×$$10-5$$ T. When the plane of the coil is rotated by $$90$$° around any of its coplanar axis in $$0.1$$ s, the emf induced in the coil will be

Question

A $$800$$ turn coil of effective area $$0.05$$ $$m2$$ is kept perpendicular to a magnetic field $$5$$×$$10-5$$ T. When the plane of the coil is rotated by $$90$$° around any of its coplanar axis in $$0.1$$ s, the emf induced in the coil will be

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Here $$N=800$$,$$A=0.05$$ $$m2$$ $$B=5$$×$$10-5$$ T,Δ$$t=0.1$$ s  Induced emf, ε$$=-$$ΔϕΔ$$t=-$$ϕ$$f-$$ϕiΔt ϕ$$i=N(B$$→·A→$$)=800$$×$$5$$×$$10-5$$×$$0.05$$×$$cos0$$°$$=2$$×$$10-3$$ T $$m2$$ ϕ$$f=0$$ ∴ ε$$=-0-2$$×$$10-30.1=2$$×$$10-2$$ $$V=0.02$$ V

A 800 turn coil of effective area $0.05 m^{2}$ is kept perpendicular to a magnetic field $5 \times 10^{- 5} T$ . When the plane of the coil is rotated by $90 °$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be

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A 800 turn coil of effective area 0.05 m2 is kept perpendicular to a magnetic field 5×10-5 T. When the plane of the coil is rotated by 90° around any of its coplanar axis in 0.1 s, the emf induced in the coil will be

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A 800 turn coil of effective area $0.05 m^{2}$ is kept perpendicular to a magnetic field $5 \times 10^{- 5} T$ . When the plane of the coil is rotated by $90 °$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be