Final Practical Quiz

The mass M is pulled down to where rod A is, released and let to oscillate.

What is one period?

• Time taken for the mass to move up from rod A to its highest position then down back to rod A.

• Time taken for the mass to move up from rod A to its highest position.

• Time taken for the mass to move up from rod A to its highest position then down back to rod A then up again to the highest position.

• Time taken for the mass to move up from rod A to its highest position then down back to rod A then up again to the highest position then back down to rod A.

Why does taking the time taken for 20 complete oscillations, then calculating the time taken for 1 complete oscillation, improves accuracy.

• Because I got a lot of free time during practical

• Because I can reduce human reaction time.

• Because I can reduce the impact of human reaction time.

• Because the stopwatch is not accurate enough

Answer explanation

A student suggests that the squared period of oscillation (T²) of a spring is directly proportional to the mass suspended on the spring.

 

Plan an experiment to investigate this relationship.

 

What is the independent variable?

• period of oscillation

• squared period of oscillation (T²)

• mass

• spring constant

Answer explanation

A student suggests that the squared period of oscillation (T²) of a spring is directly proportional to the mass suspended on the spring.

 

Plan an experiment to investigate this relationship.

 

What is the dependent variable?

• period of oscillation

• squared period of oscillation (T²)

• mass

• spring constant

Answer explanation

A student suggests that the squared period of oscillation (T²) of a spring is directly proportional to the mass suspended on the spring.

 

Plan an experiment to investigate this relationship.

 

What graph should I plot to get a straight line?

• T against m

• T² against m

• m against T²

• m against T

Answer explanation

A student suggests that the squared period of oscillation (T²) of a spring is directly proportional to the mass suspended on the spring.

 

Plan an experiment to investigate this relationship.

Sketch the graph that you will obtain when you plot T² against m.

You set up this circuit and the voltmeter does not register any reading.

What should you possibly do first?

• Take a break, have a kit kat

• Disconnect the circuit and check component by component if there is any issues with any connection.

• Ask the examiner for help

• Panic and give up

• Check parts of the circuit for loose connections.

What precaution can you take when doing electrical practicals?

• Set up the circuit in the same orientation as the circuit diagram

• Pray that the circuit works

• The circuit must be open after every reading to avoid heating of the wire

• Use as little wires as possible to reduce the impact of the resistance in the wires.

• Ensure that the connections of each leads are good

The reading on this voltmeter should be recorded to the nearest....

• 0.1 V

• 0.05 V

• 0.01 V

• 0.5 V

The reading on this ammeter should be given to the nearest....

• 0.01 A

• 0.02 A

• 0.05 A

• 0.005 A