Noble gasses ( insert gases)
A 5kg backpack will weigh 49 newtons on earth
a. 27
after that all you need to do is use the work formula as you will be able to acheive results
Answer:
when the direction of the Current changes.
Explanation:
Electromagnet refers to an iron ore wrapped around with a coil of wire, in presence of electric current. As it acts like a magnet, when current is passed through it.
The north & south poles of magnetic fields produced by such magnet, change with direction of current passed through it.