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What is the unit used of resistor?
The ohm. It is how much resistance a component or part of a circuit has to the flow of electrical charge when a voltage is induced across it.
How much current flows through a circuit if the resistance is 15 ohms and there is a 3-volt battery?
E= ( I ) x ( R ) = (15 amperes) x (4 ohms) = 60 voltsNote:When 15 amperes flows through a resistance of 4 ohms,the resistance dissipates 900 watts. If it is not part of atoaster or a blow drier, it either melts or explodes.
What should be observed when connecting a volteter into a DC circuit?
polarity is of major importance in dicect current circuits. <<>> When using meters please remember that a volt meter does not connect into a circuit, the leads are placed across the component that you are measuring. It is an amp meter that connects into the circuit, becoming part of the circuit, to measure the current flowing through that circuit.
Total amperage in a series circuit?
Voltage divided by total resistance will give the current. The resistance is simply the sum of all the individual resistances.
What is the part of a circuit the closes or opens the circuit?
Generally a circuit breaker (like a light switch) But I guess you could use a resistor of the right resistance If you are talking about the circuit breaker there is an electromagnetic coil in it which get magnetized on a specific amount of current and breaks the circuit
What units is to meausure a ohmmeter?
An ohmmeter measures electrical resistance. This is one part of "impedance", that prevents electricity from flowing freely from one part of a circuit to another. Resistance is measured in "ohms".
What part of the ohms scale of a meter are the most accurate resistance measurements made?
It really depends on what you are trying to get the resistance of. A piece of copper wire 30 feet long will only have a resistance of few ohms. A person can have a resistance of several million ohms. Making sure that your meter's leads are in good contact with whatever you are measuring is the best way to get an accurate reading.
What is the unit used of resistor?
The ohm. It is how much resistance a component or part of a circuit has to the flow of electrical charge when a voltage is induced across it.
How much current flows through a circuit if the resistance is 15 ohms and there is a 3-volt battery?
E= ( I ) x ( R ) = (15 amperes) x (4 ohms) = 60 voltsNote:When 15 amperes flows through a resistance of 4 ohms,the resistance dissipates 900 watts. If it is not part of atoaster or a blow drier, it either melts or explodes.
What should be observed when connecting a volteter into a DC circuit?
polarity is of major importance in dicect current circuits. <<>> When using meters please remember that a volt meter does not connect into a circuit, the leads are placed across the component that you are measuring. It is an amp meter that connects into the circuit, becoming part of the circuit, to measure the current flowing through that circuit.
How you can calculate ampere?
Voltage (volts) divided by Resistance (ohms). For AC circuits the resistance part of this formula is replaced by "impedance" which involves the effects of capacitors and inductors as well.
What would be the resistance of an ideal voltmeter?
The theoretical resistance (idea resistance) of an ammeter is zero. With a voltmeter, it's infinitely high. In some analog meters the full scale deflection is produced by only about 50 microamps. Actually that does not change from ammeter to voltmeter, just the configuration of the meter's external "connection circuit"changes. Simple ammeters are 'connected in series' devices. The resistance of such an ammeter must be kept very low because, if it were a high resistance, that would seriously limit the current allowed into the circuit and would impair the circuit's function. Voltmeters are 'connected in parallel' devices. The theoretical resistance of a volt meter is very high, the higher the better. It is checking the potential between two points, so, to have the least effect on the circuit it is measuring, it must draw as little current as possible.
What happens when a part of a parallel circuit is disconnected?
current decreases and resistance increases
Voltage drop - explanation in terms of electrons?
If you had a simple circuit of one hot wire (10 ohms), a load (100 ohms), and a neutral wire (10 ohms) at 120 volts; total resistance would be 120 ohms, divide 120 volts by 120 ohms = 1 amp (electrons), current stays the same in a series circuit, so 1 amp would flow through each part of the circuit, 1 amp times 10 ohms equals 10 volts dropped on each wire, 120 - (10 + 10) = 100 volts left for the load, 1 amp through the 100 ohm load proves this
How is total resistance in a series circuit determined?
Series circuit: The total voltage is the sum of the voltage on each component. The total resistance is equal to the sum of the resistance on each component. The total current is equal in every component.
How do you test pickup coil on a ATV?
A pickup coil for an ATV may be tested by measuring the resistance across the coil's electrical leads and comparing this value against the expected range specified in the ATV's shop manual.# Disconnect the pickup coil assembly from the ignition system (e.g. the CDI unit or engine control module) # Identify the coil's electrical contacts on the connector # Measure the electrical resistance between the coil's contacts with an Ohmmeter or digital volt meter.Take care not to grab both leads of your ohmmeter with your fingers while measuring this value or you'll measure your body's resistance in parallel with the coil. It's not dangerous but it might corrupt your reading.The value for working part will vary by manufacturer and model, but will typically be between 100 ohms and 350 ohms.If the coil reads as an "open circuit", or the resistance in the high 10's of k-ohms or higher, your coil is damaged and likely non-functional.
Total amperage in a series circuit?
Voltage divided by total resistance will give the current. The resistance is simply the sum of all the individual resistances.
