Ohm's law with Cobra SMARTsense

Principle

Ohm's law states that the strength of the electric current I flowing through an object is proportional to the electric voltage U. The proportionality factor here is the so-called electric resistance R. The proportionality factor here is the so-called electrical resistance R.

Benefits

• Particularly comprehensible and didactically prepared description of the experiment (reference to everyday life, etc.) incl. protocol questions.

• Contact saftey due to puzzle blocks system with corrosion-free gold plated contacts

• Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside
• Future-oriented teaching: Integration of sensors (Cobra SMARTsense) into digital science education

Tasks

What is the relationship between voltage and current?

Determine a series of pairs of measured values for voltage and current in a circuit and use them to investigate the relationship between U and I.

Learning Objectives

Students should first identify Ohm's law I ∼ U based on the measured values they have determined.

Then they should also find the condition R = constant for the validity of this law.