Open up your notes at page 5, note 11. Resistance Work in pairs - Attempt to fill in the blank spaces in note 11. resistance R  Ohms 20 

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Presentation transcript:

Open up your notes at page 5, note 11. Resistance Work in pairs - Attempt to fill in the blank spaces in note 11. resistance R  Ohms 20 

decreases 6 3 higher lower Problems on page 8

12/10/2015 Voltage, Current and Resistance Aim To discover the relationship between current, voltage and resistance Method For various resistors, measure the resistance … 

… then put the resistor into the following circuit to measure its voltage and current. A +- 12V d.c. V

Results Resistance (  ) Voltage (V) Current (A) Voltage Current

Conclusion Nat 4 only Now draw a graph of Voltage along the X axis and Current on the Y axis…..then you can work in pairs and use the ipad to work through Nat 4 BBC Bitesize Resistance Resistance is a measure of the opposition to the flow of current. An __________ is used to measure resistance. Voltage divided by current is equal to the value of resistance. ohmmeter

Open up your notes at page 9, note 18. Ohm’s Law Work in pairs - Attempt to fill in the blank spaces in note 18. voltage current voltmeter

directly current 20 resistance

V I R V A  increases

R = ? V = 12 V I = 8 mA = A R= V I = = 1500  Problems on page 14 and 15.