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What device do you use to determine how much resistance is in a circuit?
Wiki User
∙ 12y ago
There are many different devices, depending on what you need to measure.
The most common are a multimeter or an oscilloscope. But there are thousands of other devices some costing less than a dollar and can be held in the palm of your hand up to others costing hundreds of thousands of dollars that are installed in an 8 foot tall standard 19 inch wide relay rack.
Wiki User
∙ 8y ago
Wiki User
∙ 12y agomultimeter set on ohms
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How much resistance is in the circuit if it uses a current of 0.01 A?
There is insufficient information in the question to properly answer it. You need to specify, also, the voltage, in order to determine resistance from current. Please restate the question. Ohm's Law: Resistance = voltage divided by current.
If a circuit has a resistance of 4 ohm's how much voltage is needed to produce a 1.4 current in the circuit?
Voltage across a resistance = (resistance) x (current through the resistance) =4 x 1.4 = 5.6If the ' 1.4 ' is Amperes of current, then the required voltage is 5.6 volts.
If you have a DC passing through a circuit will the current decrease when you add a DC motor and if so by how much?
In the circuit where the DC motor is added, it was not specified whether the motor was added in series or in parallel to circuit elements. If it was added in series, it will increase circuit resistance and it will cause circuit current to go down. In parallel, the motor will reduce total circuit resistance, and circuit current will increase.
Why parallel circuit connection is used in common wiring practice?
A parallel circuit is used in common wiring practice because it allows one item to go out and the rest will remain on. Say that you had an office building. If every light bulb in the place was connected in series(every light bulb connected to the next on one current path), if one were to burn out, the circuit would break and all the other bulbs would go out. By using a parallel circuit, one bulb can go out and the rest can stay lit. Another reason that this occurs is because of the resistance involved in a series circuit. By connecting everything in one path, resistance to current will grow rapidly, so and current supplied to the circuit would be wasted by the resistance. Connecting in parallel gives multiple pathways for current to travel between devices and power sources, so the resistance is much lower, and more of the energy goes to powering the device rather than overcoming resistance.
How much resistance is in the circuit if it uses a current of 10ma?
Just use Ohms Law: V=IR, that is, voltage (in Volt) = current (in Ampere) x resistance (in Ohms).
How much resistance is in the circuit if it uses a current of 0.01 A?
There is insufficient information in the question to properly answer it. You need to specify, also, the voltage, in order to determine resistance from current. Please restate the question. Ohm's Law: Resistance = voltage divided by current.
What device used to open a circuit if too much current flows through it?
A circuit breaker is a device used to open a circuit if too much current flows through it.
How much resistance should be on a 5.0 kw heat strip?
Depends on the voltage. Wattage is Volts x Amps. Resistance (ohms) is Volts divided by Amps. So on a 120V circuit, it would draw 41.66 amps. To do that, it would need a resistance of 2.88 ohms. But on a 240V circuit, it would draw 20.83 amps. That would require a resistance of 11.52 ohms. Determine the circuit voltage, then use that to figure the amps, then use that result to calculate the resistance necessary.
Does a volt meter takes power from the system?
No it does not. A volt meter only reads the current that is passing through it.AnswerAll instruments draw some (albeit tiny) current from the circuit under test in order to operate. So, if this is what you mean by 'taking power from circuit', then the answer is yes, it does.Instruments also change the normal resistance of the circuit being tested -for example, ammeters increase the resistance of the circuit into which they are connected, while voltmeters decrease the circuit resistance across which they are connected. So adding a voltmeter (or an ammeter) to a circuit affects the operation of that circuit to some degree. To minimise this interference, it is important that an ammeter's internal resistance is very much lower than the circuit's resistance, and a voltmeter's resistance is very much higher than the circuit's resistance.
How much resistance does a light bulb create if it has a current of 25 mA around it in a 9 V circuit?
how much resistance does a light bulb creat if iyt has a current of 25 mA around it in a 9 V circuit?
If a circuit has a resistance of 4 ohm's how much voltage is needed to produce a 1.4 current in the circuit?
Voltage across a resistance = (resistance) x (current through the resistance) =4 x 1.4 = 5.6If the ' 1.4 ' is Amperes of current, then the required voltage is 5.6 volts.
What is the Effect of collector resistance in emitter follower circuit?
Colector resistance in an emitter follower circuit serves to place a limit on how much current can be supplied by the transistor. Often, the resistor is sized so that a short circuit in the load does not cause the transistor to fail.
If you have a DC passing through a circuit will the current decrease when you add a DC motor and if so by how much?
In the circuit where the DC motor is added, it was not specified whether the motor was added in series or in parallel to circuit elements. If it was added in series, it will increase circuit resistance and it will cause circuit current to go down. In parallel, the motor will reduce total circuit resistance, and circuit current will increase.
How do you figure out how much current is in an electrical wire?
If you know the voltage and resistance, then current = voltage divided by resistance. Otherwise, you can attach an ammeter into the circuit (in series).
What 2 Factors Determine How Much Amperage Will Flow?
Voltage and resistance determine amperage, assuming the source can provide the amperes.
What is a device that keeps too much current from flowing through wires?
closed circuit
How much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 12 ohms?
Current = voltage/resistance If those are the only components in the circuit, then Current = 9/12 = 0.75 Ampere = 750 mA
