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5/31 MCQs for:
Electromagnetism
An airplane with a wing span of 60 m flies horizontally at a location where the downward component of the Earth's magnetic field is 6.0 x 10-5 T. Find the magnitude of the induced emf between the tips of the wings when the speed of the plane is 225 m/s.
A flux of 4.0 ? 10-5 Wb is maintained through a coil for 0.50 s. What emf is induced in this coil by this flux?

A single circular loop of wire in the plane of the page is perpendicular to a uniform magnetic field B, directed out of the page as shown above.

If the magnitude of the magnetic field is decreasing, then the induced current in the wire is:

According to Lenz's law, the direction of an induced current in a conductor will be that which tends to produce which of the following effects?

The sun emits electromagnetic radiation at the rate of 2.5 × 1026 W.

The rate at which the sun is losing mass every second is;