 |
|
Give Russian equivalents of the following phrases.
An electrical image of the sound, the most common microphones, the variety of basic mechanisms, with different directional patterns, through empty space, an energy density, both the electric and magnetic fields, the rate of energy, a condition of the wave solution, the average intensity, the average of the square of a sinusoidal function.
2.Complete the sentences.
1.Microphones are transducers which detect sound signals and produce…2. Besides the variety of basic mechanisms, microphones can be designed with…3. Electromagnetic waves carry energy as they travel…4.The average of the square of a sinusoidal function over a whole number of periods is….
Give the definitions.
Microphones, Poynting vector.
Put questions to the following sentences
1. The most common microphones for musical use are dynamic, ribbon, or condenser microphones.2.Microphones can be designed with different directional patterns. 3.The rate of energy transport S is perpendicular to both E and B and in the direction of propagation of the wave..4.The average of the square of a sinusoidal function over a whole number of periods is just 1/2.
Text 6
Voltage Law
Vocabulary.
Constrain-сжимать
Direct-прямой
Consequence-следствие
Relationship-отношение
Apply-применять
Circuit-цепь
Voltage-напряжение
State-состояние
Conjunction-соединение
Utility-полезность
The voltage changes around any closed loop must sum to zero. No matter what path you take through an electric circuit, if you return to your starting point you must measure the same voltage, constraining the net change around the loop to be zero. Since voltage is electric potential energy per unit charge, the voltage law can be seen to be a consequence of conservation of energy.
The voltage law has great practical utility in the analysis of electric circuits. It is used in conjunction with the current law in many circuit analysis tasks.
The voltage law is one of the main tools for the analysis of electric circuits, along with Ohm’s Law, the current law and the power relationship. Applying the voltage law to the above circuits along with Ohm's law and the rules for combining resistors gives the numbers shown below. The determining of the voltages and currents associated with a particular circuit along with the power allows you to completely describe the electrical state of a direct current circuit.
Exercises