Download in
Google Play
Standard test circuit required practical
28/01/2023
175
8
Share
Save
Register
Sign up to get unlimited access to thousands of study materials. It's free!
Access to all documents
Join milions of students
Improve your grades
By signing up you accept Terms of Service and Privacy Policy
Register
Sign up to get unlimited access to thousands of study materials. It's free!
Access to all documents
Join milions of students
Improve your grades
By signing up you accept Terms of Service and Privacy Policy
Standard fest Standard test, circuit. Circulit Required practical-investigate current -voltage graphs. Aim of experiment: to investigate the relationship between Current & potential difference for a resistor, bulb & diode THI THE H Resistor. Method. Bulb +++ Diode. 10 Set up the following test circuit. D ↳ Ammeter in series with component. 28/01/2 Voltmeter in parallel with component. Ⓒ Set the variable resistor at its highest / lowest value. 3 measure the voltage with voltmeter & current with. ammeter •Record results in a table. Alter the variable resistor to change the current and voltage. • Record the new values in the table. Repeat until about 6 different positive current and voltage recorded. values Que ⒸSwitch the power supply terminals and repeat the experiment to get at least 6 negative voltage & current readings. @Plot a graph of I against V. (current against voltage). for a resistor (or wire) the graph will look like this: Evaluation The potential difference is directly proportional to the current. This relationship is called`' Ohm's Law? It is true because the resistance of the resistor is. fixed and does not change.. A resistor is an ohmic conductor. For a filament lamp (bulb) the graph will look like this: Evaluation: I F As voltage increases, the current also increases, As current increases, the temperature of the filament. metal inside the bulb also increases. The lons in the filament vibrate more (gain Ex), The ions collide with more electrons, increasing the resistance of the bulb - not...
Can't find what you're looking for? Explore other subjects.
Knowunity is the #1 education app in five European countries
Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.
4.9+
Average app rating
13 M
Pupils love Knowunity
#1
In education app charts in 11 countries
900 K+
Students have uploaded notes
Still not convinced? See what other students are saying...
iOS User
I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D
Philip, iOS User
The app is very simple and well designed. So far I have always found everything I was looking for :D
Lena, iOS user
I love this app ❤️ I actually use it every time I study.
Alternative transcript:
ohmic conductor. 0 The current still increases, but by a slower rate, so the graph curves. I For a diode the graph will look like this: Evaluation: A diode only allows current to flow in one direction... When the power supply terminais are switched to get negative resuirs, the voltage & current readings are O because the diode stops current from flowing in that direction. The diode's resistance is very large at low p.ds but at higher pids the resistance quickly drops and current. begins to flow. LD A safety resistor is required to prevent the current from getting too large.