The resistance value of the 4R7 resistor is 4 points and 7 ohms. The digital cable position nominal method (generally rectangular chip resistors adopt this nominal method) is to use three digits on the resistor body to indicate its resistance value. Its first and second digits are significant figures, and the third digit represents the number of "0"s added after the effective digits.

The resistance of the conductor to the current is called the resistance of the conductor. Resistance (Resistance, usually represented by "R") is a physical quantity, which in physics indicates the size of the resistance of the conductor to the current. The greater the resistance of the conductor, the greater the resistance of the conductor to current flow. Different conductors generally have different resistances, and resistance is a property of the conductor itself. The resistance of a conductor is usually represented by the letter R, and the unit of resistance is ohm, referred to as ohm, and the symbol is Ω without a letter. The current in a metal conductor is formed by the directional movement of free electrons. Free electrons frequently collide with positive metal ions in motion, and the number of collisions per second is as high as about 10. This kind of collision hinders the directional movement of free electrons, and the physical quantity representing this hindering effect is called resistance. Not only metal conductors have resistance, but other objects also have resistance. The resistance of a conductor is determined by its own physical conditions, and the resistance of a metal conductor is determined by its material properties, length, thickness (cross-sectional area) and operating temperature.