AC and DC on an Oscilloscope Screen
For Higher Physics students:
- Determine the period and frequency of the ac supply
- Find the rms voltage of the ac signal
27Oct
Comments Off on AC and DC on an Oscilloscope Screen
Momentum Lab
Click the above picture to take you to your momentum lab.
Categories: Higher Physics
24Oct
Comments Off on Momentum Lab
Charge that capacitor!
A capacitor can be used in a sensor circuit to switch on a transistor after a time interval.
Such a voltage divider circuit will act as a kind of timer.
The time the voltage across the capacitor reaches 0.7 v, to switch on the transistor, can be short or long depending on the size of the capacitance of the capacitor or the size of the resistor its being charged through.
To lengthen the time interval the resistance can be made bigger or the vakue of the capacitor’s capacitance can be made bigger.
17Feb
Comments Off on Charge that capacitor!
Share the voltage!
Click the picture to go to the sim.
Some questions:
- What do you notice about the variable resistor’s voltage as its resistance increases?
- What do you notice about the sum of the voltages across the resistors?
- For each resistor in turn, take the ratio of voltage across it and divide by the resistance. What do you notice?
14Feb
Comments Off on Share the voltage!
More on coding the normal force.
In this code I have added a slider to change the value of the acceleration of the floor.
Think of the floor of an elevator.
A positive acceleration indicates that the elevator is accelerating upwards and a negative acceleration indicates a downward acceleration.
Press the play button to start the program and then the pencil button to examine the code
5Dec
Comments Off on More on coding the normal force.
Coding the Doppler effect
The black car is moving towards an observer,represented by the green ball, while sounding its horn.
The sound waves spread out from the car. Notice that the sound waves squash up as the car approaches the observer and stretch out as the car leaves the observer behind.
Press the run button to start the program.
Can you see why the observer hears a higher frequency of sound as the car approaches and a lower frequency of sound as the car moves away?
Categories: Advanced Higher,Higher Physics
26Nov
Comments Off on Coding the Doppler effect
The Electron
In Our Time: The Electron BBC
This one is about the electron and is applicable to pupils studying Higher Physics or National 5.
Find the link below or click on the picture.
Categories: Advanced Higher,Higher Physics
31Oct
Comments Off on The Electron
Projectiles with Code.
Here is a reason why young physicists should be coding. This example is a bit complicated but following the basics of VPython you can become quite experienced.
Play this in full screen.
Categories: Higher Physics
19Aug
Comments Off on Projectiles with Code.
