Helpmyphysics

Here is a quiz for you to try on the topic of radiation.
The answers to the quiz will appear shortly.
Best of luck!

In the simulation below it can be seen that when electric current is taken from an electric cell the potential difference between the terminals decreases.

When no current is taken the tpd is at its maximum. This is the EMF of the electric cell.

The EMF of an electric cell is the maximum energy given to each Coulomb of electric charge.

This lost energy per coulomb, usually called "lost volts" is lost in the internal resistance of the electric cell.

You can download a poster for your notebook below.

InternalResistance

Hi physics lovers. Check these two videos below on internal resistance.

How to calculate the internal resistance of a cell.

Investigating the internal resistance of a cell.

You can download the physics simulation from the here:

PhET Electrical Circuit Simulation

Roll mouse over the V, W and Q for definition of these terms.

When a physicist talks about a field they are not talking about the green ones with
cows in it.

Rather they mean regions of space where objects experience a force without being touched.

To picture these regions in space physicists use arrowed lines.

The direction of the arrows show the direction where the objects experience the force.

Isaac Newton thought this experiment up about firing a cannon ball from a cannon.

Check out this movie. Roll your mouse over Isaac`s picture to get more info.

Here is a presentation on satellites.

Here are the Higher physics starter questions of the week.
You can make the questions full screen by pressing the appropriate controls on the slide.
Clicking the slide will reveal the answers