00:01
Okay, for part 1, which statement is correct about forces and electric charges in the field? okay, in order to have a magnetic force, the charge must be moving in a magnetic field.
00:23
Then automatically, choice a is not correct.
00:27
So, choice d is correct.
00:38
Note that the force, the magnetic force, is always put in the polar to the velocity.
00:47
Of the moving charge.
00:52
As such, it can only change the direction in matto -monitude.
00:57
So, also choice c is correct.
01:05
Choice b is not correct, since only the direction can change, so it's cannot speed that was slowed down that charge.
01:12
Also, a is not correct, since we need a moving, not a stationary charge.
01:18
Next, part two.
01:20
The salt pool of humang is brought near the objects in like low check off the objects that have no reaction to the magnet okay the objects that would have a reaction to magnet are ferromagnetic which are iron and nickel so aside from man metals which is a piece of plastic happy vizify an aluminum we also not have a reaction with a magnet and a copper.
02:07
An aluminum magnet, it's parametric, so it will have a reaction to the magnet...