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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 W 20 W decreases 3 6 higher lower Problems on page 8 23/05/2017 Aim Method Voltage, Current and Resistance To discover the relationship between current, voltage and resistance For various resistors, measure the resistance … W … then put the resistor into the following circuit to measure its voltage and current. + - 12V d.c. V A Results Resistance Voltage (V) (W) Current (A) Voltage Current Conclusion Resistance Resistance is a measure of the opposition to the flow of current. ohmmeter is used to measure resistance. An __________ Voltage divided by current is equal to the value of resistance. 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 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 20 20 resistance V I R increases V A W R =? V = 12 V I = 8 mA = 0.008 A Problems on page 14 and 15. R= V I = 12 0.008 = 1500 W