4 13142.02 Question 1 Requirements • 2 × ‘magnadur’ or ‘alnico’ bar magnets (e.g. Timstar MA 10130) • retort stand, boss and clamp • string • stop-clock • half metre rule • 30 cm ruler • 2 cm cube block of non-magnetic material • blu-tac • tape Question 2 Requirements • 20 ml syringe with 1 ml divisions, with a circular end on the plunger • balance measuring to 1 g, capable of measuring up to at least 2000 g • vernier caliper • sealant for syringe e.g. glue Question 3 Requirements • 3 × 1.5 V cells • 68 Ω resistor in component holder • 3.9 Ω resistor • voltmeter range 0–20V, reading to 0.01V • milliammeter range 0–200 mA, reading to 0.1 mA • connecting wires (8, may vary depending on set-up) • 2 × opaque boxes capable of holding two cells in series