Please answer the following question: Process: - Electromagnet creates magnetic field with electricity - Conductive copper wire is wrapped around a piece of metal - An electric current gets introduced from power source - Flows through the wire - Magnetic field gets created in the wire - And the metal gets magnetized - When turned off it is no longer magnetic.  Question: suppose trapping more heat radiation happens, how will it affect a WEAKER electromagnet.  - A: more - B: less - C: no effect
A:
C