Resistors

words:
produce производить
temperature температура
rate уровень
watt ватт
energy энергия
fixed фиксированный
high высокий
low низкий
the (more) . . . the (more) более. . . более чем
power сила
capacity мощность, способность
current ток
carrying переноска
constant постоянный
vary менять
variable переменный
change изменение
heat высокая температура
2. Read and translate the text.
RESISTORS
A resistor is one of the most common elements of any circuit. Resistors are used:
to reduce the value of current in the circuit;
to produce IR voltage drop and in this way to change the value of the voltage.
When current is passing through a resistor its tempera - ture rises high. The higher the value of current the higher is the temperature of a resistor. Each resistor has a maxi - mum temperature to which it may be heated without a trouble. If the temperature rises higher the resistor gets open and opens the circuit.
Resistors are rated in watts. A resistor is rated as a 1-W resistor if its resistance equals 1,000,000 ohms and its current-carrying capacity equals 1/1,000 000 amp, since P E X I IR X I I2R where P -- power -- is given in watts, R -- resistance is given in ohms and I -- current -- is given in amperes.
If a resistor has a resistance of only 2 ohms but its current-carrying capacity equals 2,000 amp, it is rated as a 8,000,000-W resistor.
Some resistors have a constant value -- these are fixed resistors, the value of other resistors may be varied -- these are variable resistors.
The watt is the rate at which electric energy is sup - plied when a current of one ampere is passing at a poten - tial difference of one volt.

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