أكاديميا - كولنز - معاجم الجيب العلمية - الفيزياء - انكليزي - فرنسي - عربي الحرف ٢_ c

Academia - Collins - Pocket Scientific Dictionaries - Physics - English - French - Arabic Letter 2_ C


catapult field
There are many catapult lines

Catapult field. When current flows through a wire in a magnetic field, as in an electric motor, a graph of the magnetic field can be drawn. The direction of movement can be predicted using the left-hand motor rule. The direction can be predicted by thinking of the field lines as if they were stretched like the rubber of a catapult.

The force exerted on the wire is a downward current flowing @


cathode
cathode f

Helipad. The negative terminal of the direct current source, or any. A path connected to it. Compare with anode.


cathode rays
rayons mpl cathodiques

Cathode rays. Radiation (energy transfer) emanating from the negative electrode (cathode of a high-voltage vacuum valve. Tests show that “rays are high-energy electrons that carry mass, charge, and energy. When these electrons collide with matter, the energy is transformed into light, X-rays, and other electromagnetic waves. This is the basis of the cathode ray valve.


cathode-ray tube (CRT)
Tube into rayons cathodiques

Cathode ray valve. A vision display device used in television, radar, vibration detectors (see CRO), and some computer screens. In each case, a small beam of high-energy electrons leaves the elec tron ​​gun, creating a spot of light where it meets the screen. The color of the resulting light depends on The nature of the screen covering: The electric and/or magnetic fields in the vacuum through which the beam passes deflect the beam, and then the light spot. The figure shows a section of this LED.

Although the cathode ray valve is complex and large in size, it is relatively inexpensive. Research is now being conducted to make flat screens, and these are beginning to replace LED and will allow the production of display screens. Much more compact and cheaper to operate.

cell
pile f

cell . A device that provides a transfer to electrical energy. Hence, the dry cell of an electric torch produces electricity when the potential chemical energy supplied with it is used. The photoelectric cell provides the transition from light to electrical energy.

1.5V dry cell

Electrochemistry includes the study of chemical sources of electricity, and there are a number of these sources in addition to the dry cell shown. These include the Leclanché and Daniell liquid cells. All of these are “primary cells” that cannot be recharged after use. The secondary cells, such as the nickel-cadmium cell and the lead-acid cell used in the car battery, can be recharged.


center of gravity ( c.g. )
Center m of gravity

center of gravity . The point at which the body's weight can be considered to act. Since gravity does not vary between small distances on the surface of the Earth, the center of gravity is c.g. The center of mass is one point. The center of gravity of a flat shape can be found by hanging it from several points close to its edges, again and again. Each time, the center of gravity is located below the suspension point. All the lines drawn with the help of the fadan thread pass through the center of gravity.

If there is a hole in the plate, it is very likely that the actual location of the center of gravity is inside the hole, that is, not on the plate itself. See also stability.

center of gravity
plummet