Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects. The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.
The instrument is a Geiger counter and is used to measure radioactive level around people's bodies.
Answer:
fluid transfer of heat by the motion of the particles of gas or fluid
Answer:
They are both forms of energy. One has to do with hearing and the other a little bit of light.
Explanation:
