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 (A) 2× 103V (B) 0.02 V (C) 2V (D) 0.2 V

Tardigrade Admin · Accepted Answer

Magnetic field B = 5 × 10-5 T Number of turns in coil N = 800 Area of coil A = 0.05 m2 Time taken to rotate Δt = 0.1 s Initial angle θ1 = 0° Final angle θ2 = 90° Change in magnetic flux Δ φ = NBA cos 90° - BA cos 0° = - NBA = - 800 × 5 × 10-5 × 0.05 = - 2 × 10-3 weder e =- (Δφ/Δ t) = (-(-)2×10-3Wb/0.1 s) = 0.02 V

Q. A 800 turn coil of effective area 0.05 $m^{2}$ is kept perpendicular to a magnetic field $5 \times 1 0^{- 5}$ T. When the plane of the coil is rotated by $9 0^{\circ}$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be

$2 \times 1 0^{3}$ V

0.02 V

2V

0.2 V

Q. 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

2×103V

0.02 V

2V

0.2 V

Q. A 800 turn coil of effective area 0.05 $m^{2}$ is kept perpendicular to a magnetic field $5 \times 1 0^{- 5}$ T. When the plane of the coil is rotated by $9 0^{\circ}$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be

$2 \times 1 0^{3}$ V