What Does the Scale Read (in N) When the Elevator Is Ascending at a Constant Speed of 2.3 M/s?
Meters
Amongst the most common meters used there are the ohmmeter, the ammeter and the voltmeter. The ohmmeter is used to measure the value of resistance. It consists of a milliammeter calibrated to read in ohms, a battery and resistors. The meter is connected in parallel and the circuit is non opened when its resistance is measured.
The readings on the scale show the measured value. The ammeter is used to measure out the value of current. When the ammeter is used the circuit should be opened at ane pointand the terminals of the meter should be connected to it. One
should take into consideration that the positive last of the meter is continued to the positive terminal of the source; the negative concluding - to the negative terminal of the source. The ammeter should exist continued in serial. The readings on the scale testify the measured value.
iii. Complete the sentences using the correct variant:
1. The ammeter is
a) a mutual meter.
b) an uncommon meter.
ii. In order to mensurate the value of current
a) the ohmmeter is used,
b) the voltmeter is used.
c) the ammeter is used.
three. A meter has
a) positive terminals only.
b) negative terminals only.
c) positive and negative terminals.
4. When the ammeter is used
a) the circuit should be opened.
b) the circuit should not be opened.
5. The ammeter should be connected
a) in series,
b) in parallel.
6. One should take into consideration that
a) the positive terminal should be connected to the negative final.
b) the positive concluding should be connected to the positive final of the source.
Pair work. Put these questions to your groupmate. Let him/her answer them.
1. What is the ammeter used for?
2. What is the voltmeter used for?
3. What is the ohmmeter used for?
4. What terminals does a meter have?
5. Should the measured circuit exist opened when the voltmeter is used?
6. Should the measured circuit be opened when the ammeter is used?
7. In what mode should the voltmeter be continued to the circuit?
8. In what way should the ammeter be connected to the excursion?
ix. What is the difference between a voltmeter and an ammeter?
x. What common meters are used to measure the values in a circuit?
Практическое занятие 5. Резисторы
Lesson five. Resistors
1. Read and learn the words:
capacity - емкость
ability - мощность
heat - теплота, нагрев
rate - скорость, степень
to produce - производить
to alter - менять(ся)
to vary - варьировать(ся)
depression - низкий
high - высокий
stock-still – постоянный
any - (зд.) любой
variable - переменный
the (more than)... the (more than) чем (больше) ... тем (больше)
2. Translate into Russian using чем ... тем :
1. The more one studies nature, the better one knows its laws.
ii. The longer one learns, the more one knows.
3. The college the atmosphere, the less is its pressure.
4. The heavier the object, the more than work ane has to practise in order to lift it.
5. The greater the number of gratis electrons in any metal, the higher is its
electrical conductivity.
three. Interpret into Russian. Mind no.
1. At that place is no free energy in this machine.
2. No charges move through an open up circuit.
iii. No material is a perfect conductor of electricity.
4. No electric machinery is used without protection.
5. No special material is needed in this case.
Read and interpret the text.
Resistors
A resistor is one of the well-nigh common elements of any circuit. Resistors are used: 1. to reduce the value of current in the circuit; two. to produce IR voltage drop and in this way to modify the value of the voltage. When current is passing through a resistor its temperature rises high. The college the value of current the college is the temperature o f a resistor. Each resistor has a maximum temperature to which it may be heated without a trouble. If the temperature rises college the resistor gets
open up and opens the circuit. Resistors are rated in watts. The watt is the rate at which electric energy is supplied when a electric current of one ampere is passing at a potential difference of one volt. A resistor is rated as a I-Due west resistor if its resistance
equals ane,000,000 ohms and its current-carrying capacity equals I/one,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 - electric current is given in amperes. If a resistor has a resistance of only 2 ohms only its current-conveying chapters equals 2,000 amp, it is rated as a 8,000,000-Westward resistor. Some resistors take a constant value - these are fixed resistors, the value of other resistors may be varied - these are variable resistors.
five. Consummate the sentences using the right variant:
1. A resistor is used
a) to measure the resistance.
b) to reduce the current.
c) to change the resistance.
d) to produce IR voltage drop.
2. When current passes through a resistor
a) its temperature drops.
b) its temperature rises.
three. Resistors are rated
a) in ohms.
b) in volts.
c) in watts.
4. Power is given
a) in amperes.
b) in watts.
5. Fixed resistors accept
a) a constant value.
b) a variable value.
6. The value of a variable resistor
a) is fixed.
b) is varied.
7. A ii-ohm resistor rated as a 8,000,000-W resistor
a) has a electric current-carrying capacity equal to 2,000 amp.
b) has a electric current-carrying capacity equal to 200 amp.
Pair work. Put these questions to your groupmate and let him/her reply them.
ane. What is a resistor used for?
2. When does the temperature of a resistor ascent?
3. What element is used to alter the value of voltage?
4. How are resistors rated?
5. What types of resistors do you know?
6. When does a resistor get open?
7. What does an open resistor outcome in?
viii. What is the difference betwixt a stock-still resistor and a variable resistor?
nine. How much is the electric current-carrying capacity of a two-ohm resistor?
ten. What resistors have a variable value?
Практическое занятие vi. Гальванические элементы
Lesson half dozen. Electric Cells
ane. Read and larn the words:
Jail cell - элемент
output - емкость, мощность
bulb - электрическая лампа
to light - зажигать, освещать
to increase - увеличиваться), возрастать
to substitute - заменять
...and then on - и так далее
Read and interpret the text.
Electric Cells
An electric cell is used to produce and supply electrical free energy. It consists of an electrolyte and two electrodes. Electrodes are used as terminals, they connect the cell to the circuit - current passes through the terminals and the bulb lights.
Cells can be connected in series, in parallel and in series-parallel. In guild to increment the electric current chapters cells should be connected in parallel. In order to increase the voltage output cells should exist connected in series. In example a bombardment has a large current capacity and a big voltage output, its cells are continued in serial-parallel.
When cells are connected in series the positive last of ane cell is connected to the negative terminal of the second cell, the positive last of the second jail cell - to the negative terminal of the tertiary ... and and so on.
When cells are continued in parallel their negative terminals are connected together and their positive terminals are also connected. In instance a cell has a trouble information technology stops operating or operates badly. This prison cell should exist substituted by another one.
3. Complete the sentences using the right variant:
1. A jail cell is used
a) to increase the voltage output.
b) to reduce the current chapters.
c) to supply electric energy.
two. The terminals of a cell are used
a) to carry current.
b) to increase voltage.
c) to connect the bombardment to a circuit.
3. When cells are connected in series
a) all the positive terminals are connected together.
b) all the negative terminals are connected together.
c) the positive final of ane cell is connected to the negative terminal of the second.
4. Cells are connected in series in order
a) to increment the current capacity.
b) to increase the voltage output.
five. In club to increase the current capacity
a) cells are connected in serial,
b) cells are connected in parallel.
4. Respond the following questions:
1. What is a jail cell used for?
2. What does a jail cell consist of?
3. What is the office of the terminals?
4. In what way are cells connected in order to increment the voltage output?
5. In what way are cells connected in lodge to increase the current capacity?
6. In what way are the terminals of series cells connected?
7. In what case does a cell stop operating?
eight. What should be done in case it stops operating?
Meters
Among the almost mutual meters used there are the ohmmeter, the ammeter and the voltmeter. The ohmmeter is used to measure the value of resistance. It consists of a milliammeter calibrated to read in ohms, a battery and resistors. The meter is connected in parallel and the circuit is not opened when its resistance is measured.
The readings on the scale show the measured value. The ammeter is used to measure out the value of electric current. When the ammeter is used the circuit should be opened at one pointand the terminals of the meter should be connected to it. I
should take into consideration that the positive terminal of the meter is continued to the positive terminal of the source; the negative last - to the negative concluding of the source. The ammeter should be continued in series. The readings on the calibration prove the measured value.
3. Complete the sentences using the right variant:
1. The ammeter is
a) a common meter.
b) an uncommon meter.
two. In social club to measure the value of current
a) the ohmmeter is used,
b) the voltmeter is used.
c) the ammeter is used.
3. A meter has
a) positive terminals only.
b) negative terminals just.
c) positive and negative terminals.
4. When the ammeter is used
a) the circuit should be opened.
b) the circuit should not be opened.
five. The ammeter should be connected
a) in series,
b) in parallel.
6. One should take into consideration that
a) the positive last should exist continued to the negative concluding.
b) the positive terminal should be continued to the positive terminal of the source.
Pair work. Put these questions to your groupmate. Let him/her answer them.
one. What is the ammeter used for?
ii. What is the voltmeter used for?
3. What is the ohmmeter used for?
4. What terminals does a meter have?
5. Should the measured circuit exist opened when the voltmeter is used?
half-dozen. Should the measured circuit be opened when the ammeter is used?
7. In what way should the voltmeter be continued to the excursion?
8. In what style should the ammeter be connected to the excursion?
9. What is the deviation between a voltmeter and an ammeter?
10. What common meters are used to measure the values in a excursion?
Практическое занятие five. Резисторы
Lesson v. Resistors
1. Read and learn the words:
chapters - емкость
power - мощность
oestrus - теплота, нагрев
rate - скорость, степень
to produce - производить
to modify - менять(ся)
to vary - варьировать(ся)
low - низкий
high - высокий
fixed – постоянный
whatever - (зд.) любой
variable - переменный
the (more)... the (more) чем (больше) ... тем (больше)
2. Translate into Russian using чем ... тем :
one. The more one studies nature, the better one knows its laws.
2. The longer 1 learns, the more i knows.
iii. The higher the temper, the less is its pressure.
iv. The heavier the object, the more piece of work 1 has to do in social club to lift it.
5. The greater the number of free electrons in any metal, the higher is its
electrical conductivity.
iii. Translate into Russian. Mind no.
1. There is no free energy in this automobile.
2. No charges movement through an open circuit.
3. No fabric is a perfect usher of electricity.
4. No electric mechanism is used without protection.
5. No special fabric is needed in this case.
Read and interpret the text.
Resistors
A resistor is 1 of the nearly common elements of any circuit. Resistors are used: one. to reduce the value of current in the excursion; two. to produce IR voltage drop and in this way to change the value of the voltage. When current is passing through a resistor its temperature rises loftier. The higher the value of electric current the higher is the temperature o f a resistor. Each resistor has a maximum temperature to which it may be heated without a problem. If the temperature rises college the resistor gets
open up and opens the excursion. Resistors are rated in watts. The watt is the rate at which electric energy is supplied when a current of i ampere is passing at a potential divergence of one volt. A resistor is rated as a I-West resistor if its resistance
equals 1,000,000 ohms and its electric current-carrying capacity equals I/1,000,000 amp, since P = East x I = IR ten I = I2R where P - ability is given in watts, R - resistance is given in ohms and I - current is given in amperes. If a resistor has a resistance of just 2 ohms but its current-conveying 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.
5. Complete the sentences using the correct variant:
one. A resistor is used
a) to measure the resistance.
b) to reduce the current.
c) to change the resistance.
d) to produce IR voltage drop.
2. When current passes through a resistor
a) its temperature drops.
b) its temperature rises.
iii. Resistors are rated
a) in ohms.
b) in volts.
c) in watts.
4. Ability is given
a) in amperes.
b) in watts.
5. Stock-still resistors have
a) a constant value.
b) a variable value.
vi. The value of a variable resistor
a) is fixed.
b) is varied.
7. A two-ohm resistor rated equally a eight,000,000-Due west resistor
a) has a current-carrying capacity equal to 2,000 amp.
b) has a current-carrying capacity equal to 200 amp.
Pair work. Put these questions to your groupmate and let him/her answer them.
ane. What is a resistor used for?
two. When does the temperature of a resistor ascent?
3. What element is used to modify the value of voltage?
four. How are resistors rated?
5. What types of resistors do you know?
vi. When does a resistor get open?
7. What does an open resistor issue in?
eight. What is the difference between a fixed resistor and a variable resistor?
9. How much is the current-conveying capacity of a ii-ohm resistor?
10. What resistors have a variable value?
Практическое занятие six. Гальванические элементы
Lesson 6. Electric Cells
ane. Read and learn the words:
Prison cell - элемент
output - емкость, мощность
bulb - электрическая лампа
to light - зажигать, освещать
to increase - увеличиваться), возрастать
to substitute - заменять
...and so on - и так далее
Read and interpret the text.
Electrical Cells
An electrical cell is used to produce and supply electric energy. Information technology consists of an electrolyte and 2 electrodes. Electrodes are used as terminals, they connect the cell to the excursion - current passes through the terminals and the bulb lights.
Cells can be connected in series, in parallel and in series-parallel. In gild to increase the current capacity cells should be connected in parallel. In order to increase the voltage output cells should be connected in series. In case a bombardment has a large current chapters and a large voltage output, its cells are continued in serial-parallel.
When cells are continued in series the positive terminal of i cell is connected to the negative terminal of the second jail cell, the positive terminal of the 2nd cell - to the negative terminal of the third ... and so on.
When cells are continued in parallel their negative terminals are connected together and their positive terminals are also connected. In example a cell has a problem it stops operating or operates desperately. This cell should be substituted by another one.
three. Complete the sentences using the correct variant:
1. A cell is used
a) to increment the voltage output.
b) to reduce the current chapters.
c) to supply electrical energy.
2. The terminals of a cell are used
a) to conduct current.
b) to increase voltage.
c) to connect the bombardment to a circuit.
3. When cells are continued in series
a) all the positive terminals are connected together.
b) all the negative terminals are continued together.
c) the positive terminal of one cell is connected to the negative terminal of the second.
4. Cells are connected in serial in order
a) to increase the current chapters.
b) to increment the voltage output.
v. In guild to increase the current capacity
a) cells are connected in series,
b) cells are connected in parallel.
4. Answer the following questions:
one. What is a cell used for?
2. What does a cell consist of?
3. What is the function of the terminals?
four. In what way are cells continued in club to increase the voltage output?
5. In what way are cells connected in order to increase the current capacity?
6. In what manner are the terminals of series cells connected?
7. In what case does a prison cell stop operating?
viii. What should be washed in example it stops operating?
Source: https://studopedia.ru/22_26052_Read-and-translate-the-text.html
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