Question

students in a science lab were given a box of materials and asked to the materials in the box to create a circuit that can be used to repel or attract another object. which of the following choices would be the effect of testing energy?
a. the battery, the magnet, and the ammeter
b. the battery, some wire, and the direction compass
c. the battery, some wire, and the ammeter
d. the battery, the iron nail, and the direction compass

Explanation:

To detect a magnetic field, a battery (to provide current), an iron nail (to become magnetized when current flows through the wire around it - electromagnet principle), and the directional compass (to show the effect of the magnetic field created) are needed. The battery provides the electrical energy, the wire and iron nail make an electromagnet when current passes through the wire around the nail, and the compass shows the magnetic field effect.

Answer:

C. The battery, iron nail, and the directional compass