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National 4 Summary Notes Unit 3 Electricity and Energy
National 4 Summary Notes Unit 3 Electricity and Energy

Name
Name

... 7. Current flows in a diode when its cathode is positive. Yes __ or No ___ 8. A diode is forward biased when its cathode is positive. Yes __ or No ___ 9. If a 20 ohm resistor is in series with a set of three parallel 30 ohm resistors the total circuit resistance is _________. 10 A 5 volt battery con ...
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... We believe that when the cable is connected and the two bias networks are in parallel with the receiver input resistance the loading may be causing the problem. New SP485 devices are not as strong as some older versions. The minimum resistance that the device can drive on a bus according to the ITU ...
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... resistor R from A to B. The value of the current flowing in and out of the resistance is I. However since work is done is moving the current through the resistor the potential at A and B are different from one another. A ...
1. The figure below shows a circuit containing a battery of e.m.f. 12 V
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... Ohmmeters work by passing a small current through the component and measuring the voltage produced. An ohmmeter does not function with a circuit connected to a power supply. If you want to measure the resistance of a particular component, you must take it out of the circuit altogether and test it se ...
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... D) 25  resistor ___A___ 2) Three resistors, 4Ω, 6Ω, and 10Ω, are connected in parallel in an electric circuit. The equivalence resistance is A) Less than 4 Ω B) between 4 Ω and 10 Ω C) between 10 Ω and 20 Ω D) 20 Ω ___B___ 3) As the number of resistors in a series circuit is increased, what happens ...
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... 3. A string of Christmas tree lights is frequently made of miniature lamps connected in series. For an 8-light, 120 Volt set, what is the voltage across each light? If one light were removed, what would happen? The voltage across the empty socket becomes equal to the line voltage. Why is this? ...
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Negative resistance

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