Перевод текста inductance and mutual inductance
mutual inductance — abipusis induktyvumas statusas T sritis automatika atitikmenys: angl. mutual inductance vok. Gegeninduktivität, f; gegenseitige Induktivität, f rus. взаимная индуктивность, f pranc. inductance mutuelle, f … Automatikos terminų žodynas
mutual inductance — abipusis induktyvumas statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. mutual inductance vok. Gegeninduktivität, f; gegenseitige Induktivität, f rus. взаимная… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
mutual inductance — abipusis induktyvumas statusas T sritis fizika atitikmenys: angl. mutual inductance vok. Gegeninduktivität, f; gegenseitige Induktivität, f rus. взаимная индуктивность, f pranc. inductance mutuelle, f … Fizikos terminų žodynas
mutual inductance — (M) inductance generated in a neighboring circuit. Called also inductance … Medical dictionary
mutual inductance — /mjutʃuəl ɪnˈdʌktəns/ (say myoohchoohuhl in duktuhns) noun the ratio of the electromotive force in one circuit to the rate of change of current in another circuit which is magnetically linked to the first circuit; coefficient of mutual induction … Australian English dictionary
mutual inductance — noun a measure of the induction between two circuits; the ratio of the electromotive force in a circuit to the corresponding change of current in a neighboring circuit; usually measured in henries • Syn: ↑coefficient of mutual induction •… … Useful english dictionary
mutual inductance — Elect. the ratio of the electromotive force in one of two circuits to the rate of change of current in the other circuit. Cf. inductive coupling. [1885 90] * * * … Universalium
mutual inductance — noun the ratio of the voltage in a circuit to the change in current in a neighboring circuit … Wiktionary
mutual inductance — A condition that takes place when the current in one winding induces an EMF in another winding in the same magnetic circuit … Dictionary of automotive terms
Mutual capacitance — is intentional or unintentional capacitance that occurs between two charge holding objects or conductors, in which the current passing through one passes over into the other. Unlike mutual inductance, mutual capacitance only works along short… … Wikipedia
Inductance — Electromagnetism Electricity · … Wikipedia
Inductance and Mutual Inductance
Any conductor has some definite value of inductance. The inductance of a conductor shows how well it can provide induced voltage.
Elements of a circuit with a definite value of inductance are coils of wire called inductors. The inductance of a coil depends upon its size and material. The greater the number of turns of a coil, the higher is its inductance. An iron core also increases the value of inductance. Coils of this type are used for low-frequency currents while coils with an air c ore are used for high-frequency currents.
Two coils A and В are brought close together and a source of vary- ln g current is applied to coil A. If a measuring device is connected across the terminals of coil В it will be found that a voltage is induced ln this coil though the two coils do not touch. The secondary voltage, tn at is the voltage in coil B, is called induced voltage and energy from °ne coil to the other transfers by induction. The coil across which the
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| current is applied is called the pri\ тагу; that in which voltage is in* duced is called the secondary. The primary and the secondary coils have mutual inductance.Mutual indue tance is measured in the same unitsas inductance, that is in henries. Thus, when a rate of change o| one ampere per second in the primarj coil will produce one volt in the sec ondary coil, the two coils have onej henry of mutual inductance. It should be taken into consideration that induction by a varying cur rent results from the change in currentnot in the current value.Th^ faster the current changes, the higher the induced voltage. 4. Complete the sentences using the correct variant: |
| £ М Л |
| Fig. 12 |
1. Any conductor has
2. Any conductor can provide
3. Elements with a definite value of inductance
4. The inductance of a coil depends upon
6. The value of mutual inductance is measured
7. Induction by a varying current
8. The faster the current changes, a
some definite value of resistance, some definite value of inductance.
electric power, induced voltage.
are called inductors, are called coils, are called sources.
its number of turns.
increases the value of inductance, decreases the value of inductance.
in watts, in henries.
results from the change in current results from the change in the current value.
the lower is the induced voltage, the higher is the induced voltage.
5. Complete these sentences using while. Follow the model on page 13.
1. An air core decreases the value of inductance.
2. An iron core is used for low-frequency currents.
3. The coil in which voltage is induced is called the secondary.
6. Answer the following questions:
What value of inductance do conductors have? What is the function of inductors?
What are elements with a definite value of inductance called? What does the inductance of a coil depend upon? How does the inductance of a coil depend upon the material of its core?
In what units is the value of mutual inductance measured? What does induction by a varying current result from? What is the relation between the current changes and the value of induced voltage?
What is the unit of resistance? What is the unit of potential difference? For what type of current is an air core used?
What is the relation between the number of turns of a coil and its inductance value?
7. Pair work. Tell your groupmate about mutual inductance. Let him/her put the questions of Exercise 6 to you and answer them.
a) Cover the right column and read the English words. Translate them into Russian and check your translation.
b) Cover the left column and translate the Russian words back into English.
| device | [diVais] | прибор |
| field | [fi:ld] | поле |
| loose | [to*] | свободный, нежесткий |
| tight | [tait] | плотный |
| self-inductance | самоиндукция | |
| to couple | 1’клр1] | соединять, сцеплять |
| to separate | [‘separeit] | отделять |
| to transfer | [traens’Ia:] | переносить |
| therefore | I’deafo:] | поэтому |
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9. Types of Current. (Unit 13)
Current is a flow of electricity through a circuit. Let us consider two main types of current direct and alternating. A direct current (d.c.) flows through a conducting circuit in one direction only. It flows provided a direct voltage source is applied to the circuit.
An alternating current (a.c.) is a current that changes its direction of flow through a circuit. It flows provided an alternating voltage source is applied to the circuit. Alternating current flows in cycles. The number of cycles per second is called the frequency of the current. In a 60-cycle alternating current circuit the current flows in one direction 60 times and in the other direction 60 times per second.
It is easy to transform a.c. power from one voltage to another by a transformer. Transformers are also used to step down the voltage at the receiving point of the line to the low values that are necessary for use.
When necessary a.c. can be changed into d.c. but this is seldom necessary.
9. Типы тока.
Ток это поток электричества через цепь. Рассмотрим два основных типа тока постоянного и переменного. Постоянный ток (DC) протекает через проводящую цепь только в одном направлении. Она течет при условии, источник напряжения в цепи постоянный.
Переменным ток (AC) является ток, который меняет свое направление потока через цепь. Он течет при условии, что используется переменный источника напряжения в цепи. Переменный ток течет в циклах. Число циклов в секунду называется частотой тока. В 60-циклах токовой цепи переменный ток течет в одном направлении 60 раз и в другом направлении 60 раз в секунду.
Легко преобразовать переменную энергию от одного напряжения к другому с помощью трансформатора. Трансформаторы используются также снижения напряжения на приемной точке линии к низким значениям, которые необходимы для использования.
При необходимости переменный ток может быть преобразован в постоянный но это нужно редко.
10. Inductance and Mutual Inductance. (Unit 14)
Any conductor has some definite value of inductance. The inductance of a conductor shows how well it can provide induced voltage.
Elements of a circuit with definite value of inductance are coils of wire called inductors. The inductance of a coil depends upon its size and material. The greater the number of turns of a coil, the higher is its inductance. An iron core also increases the value of inductance. Coils of this type are used for low-frequency currents while coils with an air core are used for high-frequency currents.
Two coils A and B are brought close together and a source of varying current is applied to coil A. If a measuring device is connected across the terminals of coil B it will be found that a voltage is induced in this coil though the two coils do not touch. The secondary voltage, that is the voltage in coil B, is called induced voltage and energy from one coil to the other transfers by induction. The coil across which the current is applied is called the primary; that in which voltage is induced is called the secondary. The primary and the secondary coils have mutual inductance. Mutual inductance is measured in the same units as inductance, that is in henries.
Thus, when a rate of change of one ampere per second in the primary coil will produce one volt in the secondary coil, the two coils have one henry of mutual inductance.
It should be taken into consideration that induction by a varying current results from the change in current not in the current value. The faster the current changes, the higher the induced voltage.