Electrical Circuits Continued
Akopọ
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.
Awọn Afojusun
- 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
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Electrical Circuits Continued. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Electrical Circuits Continued? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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