A50-cm wire placed in an east-west direction is moved horizontally to the north with a speed of 2.0 m/s. the horizontal component of the earth's magnetic field at that location is 25 μt toward the north and the vertical component is 50μt downward. what is the emf induced between the ends of the wire?

When a wire is moved inside uniform magnetic field then its free electrons will experience magnetic force on it due to which wire will have potential difference at its ends.

Now here we will have magnetic field due to earth and wire is moving in this constant field so induced emf is given by formula

given that

now by using the above formula we will have

answer: he got 23

explanation:

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.