Here is your homework exercise on the introductory work we have covered on operational amplifiers. Please hand this exercise in no later than Friday 6th March.

# Higher

## Higher HW for Thursday 29 January

Here is your next homework exercise. You must hand this in **no later than Thursday 29th January** if you want to have it corrected and receive feedback before the Physics prelim on Monday 2nd February. The questions are on AC electricity and charging/discharging of capacitors.

## charging & discharging capacitors

We looked at factors affecting the shape of the charging & discharging curves of capacitors today. Here is a video I found on youtube that covers some of the areas we discussed. Ignore the maths bit at the end, we won’t need that. Notice how the man in the film uses a lightbulb as a way of showing when the current is large or small, clever, eh?

## using an oscilloscope

Although we’ve completed the ac section of unit 2, some of you might want to get some practice at using an oscilloscope to determine the frequency & peak voltage of a signal.

Use the link below to try using the virtual oscilloscope I had on the SMARTBoard. You can view different signals by connecting different coloured leads to the inputs.

## Higher HW for Friday 16 January

Your HW sheet with questions on EMF and the Wheatstone Bridge is attached. Please hand it in no later than the above date.

## deriving the equations of motion

I’ve been looking through the results of the traffic light survey we did at the end of unit 1 of the higher course. The learning outcome that most people were unhappy about was the derivation of the equations of motion.

I put together a handout that outlines where the 3 equations come from, starting with a simple velocity-time graph. Let me know if you think your understanding of this outcome would benefit from the video treatment I have used in your homework solutions.

## equations of motion – projectile motion

How to separate out the horizontal and vertical motion of a projectile and apply the equations of motion.

## equations of motion – combining up & down vertical motion

This is an example showing the importance of adopting a sign convention at the start of your problem.

## equations of motion – final velocity

An example illustrating how to determine the final velocity of an object when initial velocity, acceleration and distance are known.

## equations of motion – initial velocity

This example shows how to find the initial vertical velocity of an object if its maximum height (apex) is known.