Answer:
Radiation can be absorbed by substances in its path. For example, alpha radiation travels only a few centimetres in air, beta radiation travels tens of centimetres in air, and gamma radiation travels very large distances. ... The thicker the substance, the more the radiation is absorbed
Answer:
The answer should be C
Explanation:
The reason for that is because electromagnet needs electricity to start attracting anything at all but it's attracting power is also stronger because of it
Warning: This may or may not be a completely correct answer, hope you compare answer and don't blindly trust my answer
Answer:
V/A
Explanation:
Resistance equals voltage divided by current. You already know resistance's unit is the Ohm. Voltage's unit is the Volt and current's is ths Ampere. Now you can do something like this:
1Ω=
⇔
Ω=V/A
Hope this helped :)
I believe the answer is the core.
Answer: It doesn’t function without a source of current
Explanation:
In an electromagnet, the magnetic field is generated by an electric current in a coil of wire which reinforces an iron core. But when the electric current applied on the mentioned core is disconnected, it immediately loses its magnetization. This also means that the intensity of the magnetic field can be controlled (increased or decreased) by changing the intensity of the electric current flowing through the nucleus.
That is why an electromagnet does not work without electric current.
