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What are the structure symbols and circuit symbols of rheostat in physics RT
R
Physics: speed, mass, density, force, gravity, pressure, buoyancy, temperature, current, voltage, resistance symbols!
Speed: v
Mass: M
Density: P (but not p is "meat" (read like this, not write like this) P is similar to "meat")
Force: F
Gravity: G
Pressure: P
Buoyancy: F
Temperature: t
Current: I
Voltage: u
Resistance: R
Physical symbols
What is the meaning of θ = arctan 1.33 = 53
Arctan or arcsin arccos are inverse trigonometric functions. The function of inverse trigonometric functions is to know the value of trigonometric functions and find the corresponding angle
Besides, it's a mathematical symbol. It's not physics
Symbol of resistance
What is the unit symbol - Ω
R or R can be used, usually in uppercase
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- 11. 20 ohm=____ Megaohm
- 12. As shown in the figure is the schematic diagram of the ohm range of the multi-purpose meter, in which the full bias current of the ammeter is 300 μ a, the internal RG = 100 Ω, the maximum resistance of the zero adjusting resistance R = 50K Ω, the fixed resistance in series R0 = 50 Ω, and the battery electromotive force E = 1.5V A. 30kΩ～80kΩB. 3kΩ～8kΩC. 300Ω～800ΩD. 30Ω～80Ω
- 13. What is the maximum allowable current for a 40 ohm, 10W resistor?
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- 15. When an electric stove is connected to a 220 V circuit, it takes 5 minutes to boil a pot of water. Then, when it is connected to a 110 V circuit (other conditions remain unchanged), the time required to boil such a pot of water is () A. 20minB. 15minC. 10minD. 5min
- 16. Why does the brightness of the light bulb dim when a 1200W electric kettle is connected to the home circuit resign from office because of age
- 17. If a resistance wire of an electric furnace is cut off and connected to the circuit again, will the power consumed by the electric furnace be reduced?
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- 19. "In long-distance power transmission, if the transmission voltage is 2000V, the transmission power is 10kW, and the resistance of the transmission line is 20ohm, the power loss on the transmission line is more
- 20. The total resistance of the transmission line is r = 20 Ω The total resistance of transmission line is r = 20 Ω (1) It is proved that if the transmission power is 40kW and the transmission voltage is U1 = 1000V, the user's voltage is less than 220V (2) Try to calculate: if the voltage of U1 = 2000V is used for power transmission, and the remote users can obtain 50KW electric power to generate electricity What is the output power of the station?