An aircraft with a wingspan of 25 m flies horizontally at 540 km/h in a region where the vertical component of earth's magnetic field is 4 × 10⁻⁵ T. The potential difference between the wingtips is:
A conducting rod of length 1 m moves with a uniform velocity of 2 m/s perpendicular to its length in a uniform magnetic field of 0.5 T directed perpendicular to the rod's motion. The induced emf is:
A rod PQ of length L moves with velocity v in a region of magnetic field B. If the angle between B and the plane containing the rod and its velocity is α, the motional emf is:
A metallic rod of length 1 m is rotated with an angular frequency of 400 rad/s about one end, perpendicular to a uniform magnetic field of 0.5 T parallel to the rotation axis. The emf developed between the center and the ring is:
A copper rod of length 0.5 m is rotated about one of its ends with angular velocity 10 rad/s in a magnetic field of 0.1 T perpendicular to the plane of rotation. The emf developed across its ends is:
