20 ohm=____ Megaohm

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• 2. How to express the 30 MB symbol of resistance
• 3. Who knows how to look at the resistance color, how much resistance value
• 4. Unit conversion of resistance 1)400Ω=___ KΩ=___ MΩ 2)1.5KΩ=__ Ω=__ MΩ 3)16000Ω=_____ KΩ=_____ MΩ 4)0.3MΩ=___ KΩ=____ Ω Help. Thank you
• 5. The number measured by the 2000K ohm range of the multimeter is 900. Should the reading be 900K ohm or how much?
• 6. What is the resistance of a 0 ohm resistor? Is it possible to reach one milliohm? Just want to know the exact range
• 7. What material is the resistance in the test pen?
• 8. Why is the resistance in the electric pen very high?
• 9. Conductivity unit: 1ms / cm = () us / cm
• 10. Relationship between conductivity and resistance I use the conductance meter to measure the value of 3.03ms &; cm2. I want to convert it into. Ω &; cm2. What should it be and how to calculate it. Thank you
• 11. 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
• 12. What is the maximum allowable current for a 40 ohm, 10W resistor?
• 13. There is a resistance marked "1K Ω 10W", the maximum current allowed to pass is a, and the maximum voltage allowed to be applied at both ends of it is v
• 14. 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
• 15. 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
• 16. 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?
• 17. The output voltage of a generator is 220 V, the output power is 110 kW, and the electric energy is transmitted to the distance by a wire with a total resistance of 0.3 ohm (1) What is the power loss on the transmission line if the voltage is directly 220 V? (2) what is the power loss on the transmission line if the voltage is increased to 6000 V by transformer
• 18. "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
• 19. 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?
• 20. If only the gas is heated and not allowed to expand, how will the internal energy of the gas change? If the heat is not transferred to the gas and the gas is required to work outwards, how will the internal energy of the gas change