Electrical Circuits Continued
Bayani Gaba-gaba
How do you get exactly 3 volts out of a 9 volt battery for one part of a circuit? The answer is a potential divider, a pair of resistors that share out the voltage in proportion to their resistance. It is one of the neatest and most useful ideas in electronics.
In this lesson you will see why the voltage across a conductor grows with its resistance at constant current, learn how a variable potential divider works, and use the potential-divider equation to calculate the share of the voltage across each resistor. These ideas power the sensing circuits behind thermostats and light-controlled switches.
Manufura
- [Core] Calculate the combined resistance of two or more resistors in series
- [Core] Know the advantages of connecting lamps in parallel in a circuit
- [Core] Know that, for a parallel circuit, the current from the source is larger than the current in each branch
- [Core] Know that the combined resistance of two resistors in parallel is less than that of either resistor by itself
- [Supplement] Recall and use in calculations, the fact that (a) the sum of the currents entering a junction in a parallel circuit is equal to the sum of the currents that leave the junction (b) the total p.d. across the components in a series circuit is equal to the sum of the individual p.d.s across each component (c) the p.d. across each branch of a parallel arrangement of components is the p.d. across the whole arrangement
- [Supplement] Calculate the combined resistance of two resistors in parallel
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Electrical Circuits Continued. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Two equal resistors in series across a 12 V supply each have a voltage of: A. 3 V B. 6 V C. 12 V D. 24 V Answer: B
- In a potential divider, R1 = 200 ohm and R2 = 100 ohm across 9 V. The voltage across R1 is: A. 3 V B. 4.5 V C. 6 V D. 9 V Answer: C
- At constant current, the p.d. across a conductor is: A. inversely proportional to resistance B. proportional to resistance C. independent of resistance D. equal to the current Answer: B
- A variable potential divider is most easily made using a: A. fixed resistor B. potentiometer (slider) C. single wire D. battery only Answer: B
- Replacing one resistor in a divider with a thermistor makes the output voltage respond to: A. light B. sound C. temperature D. pressure Answer: C
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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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