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