Review practical planning in Edexcel A-Level Physics through apparatus choices, measurement methods, controlled variables, safety and graph-based plans.
A student added small lead spheres to a test tube. The student placed the test tube in a small beaker of water. The test tube floated as shown.
The student gave the test tube a small vertical displacement. The test tube then oscillated vertically.
The student measured the time period T of the oscillations using a stopwatch. She repeated the measurement of T and calculated a mean.
Describe two other techniques she should use to determine T.
The student estimated that the diameter of the test tube was approximately 2 cm .
Explain why vernier calipers are a suitable instrument to measure the diameter. Your answer should include a calculation.
Two identical capacitors were connected in series and charged. They were then discharged through a resistor and ammeter.
A student investigated how the current in the resistor varied as the capacitors discharged.
State one safety precaution the student should take.
