Electric Circuits (continued)
Gbogbo ọrọ náà
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.
Ebumnobi
- Know that the p.d. across an electrical conductor increases as its resistance increases for a constant current
- [Supplement] Describe the action of a variable potential divider
- [Supplement] Recall and use the equation for two resistors used as a potential divider R V 1 = 1 R V 2 2
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Electric Circuits (continued). Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Series Circuits
Interpret circuit diagrams and diagram basic circuit elements
"Physics: Series Circuits" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/19-2-series-circuits. Access for free at https://openstax.org/books/physics/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Electric Circuits (continued)? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
