The statement that is true is that positively charged objects attract negatively charged objects. This is due to a law that states 'like forces attract while unlike forces repel. This same concept applies to magnetism. If you put two similar poles together, for example; if you place two south poles together. You feel a separating force between the two poles. But if you place two opposite poles together they attract each other. Hope i helped. <span />
Answer:
Velocity
Explanation:
Velocity is an object's change in motion per unit time in a specified direction
Answer:
magnitude of net magnetic field at given point is

Explanation:
As we know that magnetic field due to a long current carrying wire is given as

here we we will find the magnetic field due to wire which is along x axis is given as

r = 2 m
now we have

into the plane
Now similarly magnetic field due to another wire which is perpendicular to xy plane is given as

r = 2 m
now we have

along + x direction
Since the two magnetic field is perpendicular to each other
So here net magnetic field is given as


I don’t see any answer choice but the best way is asking questions about the natural phenomenon, making hypothesis, and predicting the consequences in the hypothesis.