Each group needs:

• 1 6-V Zn-C battery (US $1.30)
• 1 compass (diameter 16 mm; US $1)
• 1 75-cm length wire
• 1 6.2 V, 0.5 A incandescent light bulb (US $1.30)
• 1 light bulb receptacle (US $1.98)
• 4 textbooks
• Induced Magnetic Field Worksheet