Which of the following could you do to increase the strength of an electromagnet?

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

Aphysical change is a change in the size, shape,, or stafe of matter true or false

In the first law of thermodynamics, triangle e=q-w, what does q stand for