JEE Main202126 Feb 2021Evening ShiftPhysicsMagnetic Properties of MatterActual
An aeroplane, with its wings spread 10 m , is flying at a speed of 180 km h - 1 in a horizontal direction. The total intensity of earth's field at that part is 2 . 5 × 10 - 4 Wb m - 2 and the angle of dip is 60 ° . The emf induced between the tips of the plane wings will be
Options
- A108 . 25   mV
- B54 . 125   mV
- C88 . 37   mV
- D62 . 50   mV
Correct answer
A. 108 . 25   mV
Step-by-step solution
∈ = B → V → L → = B V L sin θ = 2 . 5 × 10 - 4   T 180 × 5 18   m   s - 1 10   m sin 60 ° = 108 . 25 × 10 - 3   V