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A VOM 'Voltage Meter' measures from a electrical outlet. Any voltage over a 1000 should never be measured directly with it.
Wiki User
∙ 9y ago
Wiki User
∙ 11y agoAny voltages over 1000 volts unless special test leads are used.
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Why must resistance never be measured in an active circuit?
First of all, in an active circuit, there are voltages flowing through various nodes. If you try to measure the resistor, those voltages will cause error in your meter, or may damage your meter. Second of all, even if you cut the power, any loop in the circuit around the resistor will affect the measured impedance. Unless you are certain that only the resistor will see the current introduced by the meter, you must take the resistor out of circuit to measure it.
Which is worse getting hit with 220 volts or 480 volts?
All things being equal and in a non-lethal event, 480 would cause more pain. But dead is dead at any voltage. In the US, both 220 and 480 require at least 2 hot conductors. Someone should never be hit by these voltages because you should never have 2 hot conductors in your hands at the same time.
Why are high voltages not used in the home?
because you will get shockedHigh voltages are not used in residential settings primarily because of electro-magnetic interference. Although it would be much more efficient you would never be able to watch tv,listen to a radio...etc.AnswerHigh voltages are only necessary for the transmission and distribution of electricity; the reasons for this simply don't apply at the point of use. The hazards involved with high voltage make it completely unsuitable for use in the home.
What should you never put on a grease fire electricity?
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Why is voltage also called potential difference?
Your question should really be the other way around! Technically, the correct term is 'potential difference'. Since this is measured in volts, over time it has also become known as 'voltage'. A similar thing has happened, but to a lesser extent, with 'power' which, being measured in watts, is often referred to as 'wattage'.So, 'voltage' is simply another word for 'potential difference'. Originally, it meant 'potential difference expressed in volts' but, these days, it applies to microvolts, millivolts, volts, kilovolts, or megavolts!Take care, however, not to confuse 'voltage' and 'potential'. These are different, and voltage should never be used when you mean potential.
Why must resistance never be measured in an active circuit?
First of all, in an active circuit, there are voltages flowing through various nodes. If you try to measure the resistor, those voltages will cause error in your meter, or may damage your meter. Second of all, even if you cut the power, any loop in the circuit around the resistor will affect the measured impedance. Unless you are certain that only the resistor will see the current introduced by the meter, you must take the resistor out of circuit to measure it.
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You should not weld on concrete, as it can explode if heated
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A: The sun is very very bright, and if you stare at it you could permanently damage your eyes.
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Looking at the sun is very damaging to your eyes. You should never look directly at the sun.
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Unless it is a service vehicle that is in use for maintanence, you should never park directly in front of an aircraft.
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Polyurethane is definitely not recommended to inhale. This substance should always be used in a well ventilated room and should never be directly inhaled.
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"We" never carried it in the first place. You should write directly to whomever you're talking about and ask them.
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