Tagged: physics
stopping sound / large & small ears
visitors this year: 67 photo credit: unsplash-logoJoanna Kosinska
characteristics of a thermistor
visitors this year: 151 A thermistor is an electronic component whose resistance changes with temperature. The voltage and current of a thermistor can be measured as the temperature changes. Sensors allow you to take...
magnetic field in a coil
visitors this year: 107 You can ‘see’ magnetic fields using iron filings. You can measure the strength of magnetic fields using a magnetic field sensor connected to a computer. How, for example, does that...
current-voltage relationships
visitors this year: 72 In this experiment the resistance of a lamp, resistor or diode is measured as the current is varied. Voltage and current sensors make the measurements while the software plots the...
capacitor discharge
visitors this year: 60 The voltage and current in a circuit change when a capacitor charges and discharges. Computer sensors can measure these changes and software can plot a graph as fast as this...
types of battery 2
visitors this year: 56 Batteries or electrical cells are made using different substances. There are zinc dry-cells, alkaline cells and lead-acid accumulators. When you use them, the chemicals become exhausted at different rates. So...
types of battery
visitors this year: 103 Batteries are a handy source of power. You’ll know that there are different kinds of batteries, and maybe that some are good for some jobs, and some for others. But battery...
pendulum & simple harmonic motion
visitors this year: 198 A position sensor can be used to study this. The sensor is attached to a weight and spring assembly as shown. This can also be used to study the effects...
pressure & temperature
visitors this year: 218 The pressure in a sealed container changes with temperature. These changes can be monitored using sensors attached to the computer. A graph of pressure against temperature can be plotted as...
radioactive half-life
visitors this year: 177 Radioactive materials decay, or lose their radioactivity, in a predictable way. If you have a fast decaying source, such as Protactinium with a half life of just 72 seconds, you...
heat conduction through a window
visitors this year: 39 Get two temperature sensors to measure the temperature inside and outside a window. You may find that over a long period of time it is best to record your data...
heat conduction
visitors this year: 105 You can use a temperature sensor to study the conduction of heat through materials. Two temperature sensors allow you to compare different materials at the same time. In this example,...
