A train is moving with a velocity of 70 km/h. If north is taken as the positive direction, what is the direction of movement of the train?

It is moving north but is speeding up. ,

It is moving north. ,

It is moving south.

It is moving south but is speeding up.

B: It is moving north.

Explanation:

We are told that a train is moving with a velocity of 70 km/h.

Now, we are also told that the positive direction is north.

This means that the train is moving in the northern direction.

We can't say if it is speeding up or not because we are not given the acceleration.

Thus, option B is correct

coil wire, increase current, put iron inside the coil

i think the answer is a and b

i wish you luck