- •Part I
- •Text. Physics and physical phenomena
- •Laboratory Exercises
- •Additional Material
- •M. V.Lomonosov
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Measurement of Volume
- •Text. The metric system
- •Dimensions of a Solid Body
- •Laboratory Exercises
- •Additional Material
- •Origin of the Metric System
- •Text. The kinetic theory and the three states of matter
- •3 Not to matter — не иметь значения will make full use — займут
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Text. Mass and weight
- •3. Much, more, the most; little, less, the least; good, bet ter,
- •4, .,. Er than, more ... Than
- •5. At, on, over .., etc.
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Text, force, work, energy and power
- •Exercises
- •Additional Material
- •1. Have supported, has altered....
- •2. Energy can be converted...
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Isaac Newton
- •Text. Heat
- •1. Heat is known to be a form of energy.
- •2. You place, you placed, you have placed. They take, they took, they have taken.
- •3. Newton began to think about heat.
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Text. Transmission of heat
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Good and Bad Conductors of Heat
- •Text. Calorimeters
- •1. It is usual to transfer ...
- •2. There is; is there; there is no ...
- •3. The setting up of ...; the reading of ...
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Text. Wave motion and sound
- •1. It does not move forward but returns again...
- •2. It is evident, it is clear.
- •Exercises
- •Additional Material
- •Text. Light
- •1. It becomes red-hot, it is the reason, it was cold...
- •2. High temperature produced by..., in a substance called... . Exercises
- •Laboratory Exercises
- •Additional Material
- •Text. Reflection and refraction of light
- •1. Do bodies emit? Does he make? Did it represent?
- •2. Have they shown? Had he travelled? Was it reflected? Is he going? Exercises
- •Laboratory Exercises
- •Additional Material
- •Text. Lenses
- •1. After leaving the lens...
- •Exercises
- •Additional Material
- •Text. Simple cell
- •1. The twitching of; the reading of...
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Voltaic Cells
- •Text. The accumulator
- •1. A plate containing, a plate being immersed...
- •2. Achieved by connecting; determined by testing...
- •Exercises
- •Additional Material
- •Text. Principle of electric motor
- •1. They are used to pull...
- •2. When viewed, while doing...
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Electric Bell Circuit
- •Text. Moving-coil ammeter and voltmeter
- •Exercises
- •Laboratory Exercises
- •Additional Material
- •Moving-Coil Galvanometer
- •Text. Electromotive force
1. They are used to pull...
They are used to transform. They were used to count. They will be used to build.
2. When viewed, while doing...
While discussing that interesting question, we argued a lot about it. The direction of a current is anticlockwise when viewed from above.
Exercises
1. Listen, read and translate the text.
2. Answer the following questions in a written form:
1. What purpose are electric motors used for? 2. What fundamental parts of an electric motor do you know? 3. How does a current from a battery flow? 4. When is the current made to reverse? 5. What is called a commutator?
3. Copy these sentences putting "rotates", "the armature",
"a commutator", "repel", "the coil", "a vacuum cleaner"
in the blanks:
1. Electric motors are used to operate ... . 2. ... is the device which automatically changes the direction of the current in ... . 3. Like poles ... each other. 4. A coil of wire which is wound on a soft iron core is called ... . 5. The commutator ... with the coil.
4. Make up and write 6 questions using the words given in the table:
108
Are Is Will be Was Were |
they it |
used to |
transform energy? produce sound? pull trams? rotate the commutator with the coil? attract bodies? produce current? operate a radio receiver? |
5. Make up 5 questions to the following sentences and translate them into Russian:
1. The electric motor is a machine which converts electrical energy into mechanical energy. 2. The required reversal of current is produced by means of a commutator. 3. The commutator is a split metal ring attached by insulating materials to the spindle on which the loop rotates. 4. The ends of the loop are attached to separate sections of the commutator. 5. The current is supplied to the loop through the commutator by means of brushes.
6. Make up and write 10 sentences using the words given in the table:
While preparing for an examination |
she they |
always studies in the reading-hall. sed to study in the library. will work systematically. |
When heated to a sufficient high temperature |
a body a steel bar |
becomes a source of light. becomes a source of heat. |
While vibrating |
a body strings |
produces a sound. will produce a sound. produced a sound. |
109
While measuring a current |
the ammeter |
is connected in series in the circuit. can be connected to any part of the circuit. will be able to be connected to any part of the circuit. was connected in series in the circuit. |