A jet plane with a wing-span of is travelling horizontally towards the east with a speed of . If the Earth's magnetic field at the location is and the angle of dip is , then, the potential difference between the ends of the wing is
A magnetic compass needle oscillates times per minute at a place where the dip is and times per minute where the dip is . If and are the net magnetic fields due to the earth at the two places respectively, then the ratio is approximately equal to
A magnet makes oscillations per minute at a place having magnetic field intensity of . At another place, it takes to complete one vibration. The value of earth's horizontal field at that place is
At a given place on the Earth's surface, the horizontal component of earth's magnetic field is and resultant magnetic field is . The angles of dip at this place is
Two coils, each of turns, are held such that one line in the vertical plane with their centres coinciding. The radius of the vertical coil is and that of the horizontal coil is . How would you neutralize the magnetic field of the earth at their common centre? What is the current to be passed through each coil? Horizontal of earth's magnetic induction and angle of dip ..
The magnitude of the earth's magnetic field at a place is and the angle of dip is . A horizontal conductor of length , lying north-south, moves eastwards with a velocity . The emf induced across the rod is
Calculate the angle of dip, if a dip needle oscillating in a vertical plane make oscillations per minute in a magnetic meridian and oscillations per minute in a vertical plane at right angle to the magnetic meridian
The angle of dip at a certain place on earth is and the magnitude of the earth's horizontal component of the magnetic field is . The magnetic field at the place on earth is