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What is 75 ohm?
Ohms are a measure of resistance to electric current.You're probably talking about a 75 ohm coaxial cable. In this case, 75 ohms is the characteristic impedance of the cable.
What size steel wire armoured cable for 40 amps 230 volts at 500 meters away?
On a 230 v supply assuming a volt-drop of 5% that is 11.5 v, so the maximum cable resistance is 11.5 / 40 in ohms, 0.2875 ohms so for 1000 metres of cable in total you need a cable that has 0.0002875 ohms of resistance per metre. Copper with a cross-section of 1 mm2 has resistance of 0.0168 ohms per metre so the size of cable needed is 0.0168 / 0.0002875 mm2, which is 58.43 mm2, so a cable of 60 mm2 should be selected.
What is the purpose of 50 ohms antenna?
A; it is to match the cable line impedance to the receiver for maximum transfer of energy
What is the difference between Ohms and Ohms CT in impedance of an audio transformer?
The difference in between Ohms and Ohms CT is that in Ohms CT it has CT at the end.
How do you calculate 1.67 ohms?
ohms law.
How do you know if you have a bad cable when checking ohms?
If the ohms are infinite or greater than one megohm you can conclude the cable is bad. Usually if the ohms are greater than 3 ohms the cable is bad. If the cable is less than 3 ohms it depends on what the cable is used for and how long it is.
You want to fit a heater in a outhouse from a domestic 240v supply the cable has a resestance of 1.5 ohms and the heater has a resistance of 28.5 ohms what is the voltage drop in the cable?
31.5
What is 75 ohm?
Ohms are a measure of resistance to electric current.You're probably talking about a 75 ohm coaxial cable. In this case, 75 ohms is the characteristic impedance of the cable.
What size steel wire armoured cable for 40 amps 230 volts at 500 meters away?
On a 230 v supply assuming a volt-drop of 5% that is 11.5 v, so the maximum cable resistance is 11.5 / 40 in ohms, 0.2875 ohms so for 1000 metres of cable in total you need a cable that has 0.0002875 ohms of resistance per metre. Copper with a cross-section of 1 mm2 has resistance of 0.0168 ohms per metre so the size of cable needed is 0.0168 / 0.0002875 mm2, which is 58.43 mm2, so a cable of 60 mm2 should be selected.
What is the impedance of a RG-59 video cable?
RG-59 is RF cable, it is 75 ohms and it will carry video too.
Do you use the ac volts position when checking the continuity of a resistive coil?
No, you use the ohms position.
What is the typical impedance of a shielded twisted pair cable?
STP has an impedance of 150 Ohms.
What is the difference between continuity and resistance check?
Continuity is checking for a completed circuit including a short circuit. Checking resistance would be checking in ohms resistance of a circuit, motor windings or an open circuit.
Can you measure ohms from a live 115v AC outlet?
No, the circuit should not be energized when checking the resistance of a circuit.
While checking the power cable you notice broken insulation What should you do?
Replace the power cable.
What is the purpose of 50 ohms antenna?
A; it is to match the cable line impedance to the receiver for maximum transfer of energy
How do you have sound with cable TV and DVD?
Most home speakers are rated at 8 ohms, but your receiver should be able to work speakers as low as four ohms, with reduced output. Car stereos are normally 4 ohms, but should work up to eight ohms, with reduced output. It's all in the design of the electronics.
