Question

how is copper used in cell phones? (1 point)
○ in the display
○ in the speakers
○ in the circuitry
○ in the battery

Explanation:

Copper is a good conductor of electricity. Cell phone circuitry requires conductive materials to transmit electrical signals, and copper is commonly used in the circuitry for this purpose. Displays, speakers, and batteries typically use other materials more relevant to their functions (e.g., displays use materials for light emission/control, speakers for sound production, batteries for energy storage/transfer with different chemistries).

Answer:

C. in the circuitry