So for school we have been measuring the resistance, volts and current of various kettles. In comparison with results from other kettles- i have gotten kettles with high resistance but also high amps. How exactly is this possible?

 

Kettles? Like an electric rice cooker or an actual kettle? I don't understand.

 

Kettles which boil water- for tea and coffee

 

Current of a kettle? You have discovered a kettle generator? Can you take a picutre of it.

 

Im just using a simple power saver deceive to measure the amps/voltage and an ammeter to measure the resistance.

 

Im just using a simple power saver deceive to measure the amps/voltage and an ammeter to measure the resistance.

Try doing it with incandesent light bulbs. You'll do your head in quicker.

Dynamic resistance.

 

the resistance changes as it heats up.

 

........................i have gotten kettles with high resistance but also high amps. How exactly is this possible?

Im just using a simple power saver deceive to measure the amps/voltage and an ammeter to measure the resistance.

The cold resistance can be different than the hot resistance. Under what measurement conditions do you measure high resistance with a high current?

 

A "smart" kettle may use a triac for temperature control, and thus will not be always full on like a light bulb.

 

A "smart" kettle may use a triac for temperature control, and thus will not be always full on like a light bulb.

Good point. That would account for the high resistance with high amps with high resistance, since the triac would give a high resistance reading to an ohmmeter.