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With switch s1 closed meter m4 reads 4 volts across r3. what voltages would the meter read across r1 and r2?
Wiki User
∙ 7y ago
This question is hard to answer as the question does not state whether R1 and R2 are in series or parallel with R3. Also helpful would be the source voltage supply and the value of the resistors.
Wiki User
∙ 7y ago
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When measuring voltage drop across a switch what is the maximum allowable voltage drop?
The voltage drop should be as close to zero as would be readable by a typical volt meter. If it is measurable you likely have a problem with corrosion or oxidation in switch that is increasing resistance. If you can measure a voltage drop across a closed switch contact, replace the switch. Or the switch is open, try flipping the switch!
Why does your digital multimeter read ac and dc on same terminal?
The switching of the circuitry is done internally for the different voltages. This is done when you move the switch on the front of the meter from AC to DC.
How can wire up the voltmeter to measure 3 phase supply without rotary switch?
There are only two ways this can be accomplished. The most economical way to measure three phase voltages is with one meter and a rotary switch, that has an off position, to connect the one meter to each of the three phases one at a time. The other approach is to have three volt meters connected to each phase to measure each phase individually. With the three meter approach you will still need a switch in each meter so that the meter can be taken out of the circuit when no reading is needed.
What happens inside a voltmeter when you switch it from a lower to a higher voltage range?
When you switch a voltmeter from a lower to a higher voltage range, an additional resistor is added in series with the meter, increasing the voltage necessary to create the same voltage drop across or current flow through the actual meter movement.
Assume that the function range switch is on the 20k position and the multimeter displays 1 when the test leads are across an unknown resistor What would most likely cause the meter to display 1?
the function range switch is not set on a high enough scale
When measuring voltage drop across a switch what is the maximum allowable voltage drop?
The voltage drop should be as close to zero as would be readable by a typical volt meter. If it is measurable you likely have a problem with corrosion or oxidation in switch that is increasing resistance. If you can measure a voltage drop across a closed switch contact, replace the switch. Or the switch is open, try flipping the switch!
How do you check hrc fuse?
An ohm meter across the fuse will tell you whether the link is open or closed.
Why does your digital multimeter read ac and dc on same terminal?
The switching of the circuitry is done internally for the different voltages. This is done when you move the switch on the front of the meter from AC to DC.
When you connect a multimeter across an open component what is the reading?
That will depend on the setting of the meter switch and the circuit connected to the component (if there is one).
How can wire up the voltmeter to measure 3 phase supply without rotary switch?
There are only two ways this can be accomplished. The most economical way to measure three phase voltages is with one meter and a rotary switch, that has an off position, to connect the one meter to each of the three phases one at a time. The other approach is to have three volt meters connected to each phase to measure each phase individually. With the three meter approach you will still need a switch in each meter so that the meter can be taken out of the circuit when no reading is needed.
What are the function of different parts of VOM?
The VOM is in the classification of a multimeter. This means that the one meter can do several functions. VOM stands for Volt Ohm meter. In the voltage portion, the meter has the ability to measure a variety of voltages from fractional usually up to 1000 volts. This is both AC and DC voltages. In the ohms portion, the meter has the ability to find the resistance of components. On most good multi meter there is a continuity setting that will have a sound emitted if what you are testing has continuity through it. That setting is very useful in troubleshooting control panels to locate open and closed contacts in energized and de energised relays.
What is the difference between milli volt meter and volt meter?
A milli voltmeter is suitable for measuring voltage/potential difference in milli volts, thus they measure smaller voltages. A regular voltmeter is used to measure comparatively larger voltages.
What are the basic instrument that can be used to directly measure the AC voltages?
Digital Volt Meter (DMM)
What is instrument potential transformer?
it is used to measure very high voltages which can not be measured with volt meter.
What happens inside a voltmeter when you switch it from a lower to a higher voltage range?
When you switch a voltmeter from a lower to a higher voltage range, an additional resistor is added in series with the meter, increasing the voltage necessary to create the same voltage drop across or current flow through the actual meter movement.
How do you check whether supply is coming or not in 3 phase?
Voltage is checked with a volt meter. It doesn't have to be 3 phase. It is used to test any potentials across phase to phase, line to neutral, line to ground or across resistances. Be careful when testing live voltages as a misplace of the meter probes could cause an arc flash that could give you three degree burns to any exposed skin.
With machine in neutral neutral light doesn't come on and electric start don't work?
Switch for neutral broken or not in correctly. It may operate a relay. Find it and see if it comes on and off with you switching the machine out of neutral and back. If it is fused check that. You can put your meter across the open fuse and watch the meter as you switch.
