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What is the resistance of an object if a voltage the voltage of 40 V produces a current of 5?
Wiki User
∙ 12y ago
Ohm's Law: Resistance = Voltage divided by Current
40 volts divided by 5 amperes = 8 ohms.
Wiki User
∙ 12y ago
Wiki User
∙ 11y ago8 ohms
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How is conductivity related to resistance?
It requires a force to propel an object through air, because of the air resistance. Normally, if there were no air resistance and the object were being propelled on the level with no friction, a constant force would accelerate the object steadily. However, it would require a steady force to propel the object through air even without acceleration. And the faster it went the more resistance it would meet.
What is the nature of the current voltage graph for an unknown resistor?
Fixed-value resistors are normally manufactured so that they obey Ohm's Law -that is, the ratio of their voltage to current remains constant for variations in voltage, within specified limits. In other words, their resistance value remains constant for variations in voltage. This would produce a straight-line curve when plotted. Devices and materials that do not obey Ohm's Law (e.g. semiconductors, etc.) would produce a curved line.
Why the series resistor of the voltmeter is high?
Aim of any measuring instrument is to measure the object without affecting it. Voltmeter is used to measure voltage between two points and connected in parallel. Thus voltmeter should not change the voltage. If voltmeter resistance is very high, it will be as good as infinity compared to load. Thus connecting voltmeter will not change the voltage and measure it accurately.
What is the Symbol for mega ohm?
The ohm (symbol: Ω) is the unit ofelectrical resistance in DC circuitselectrical resistance, reactance and impedance in AC circuits.It is named after Georg Ohm.An ohm is the standard measurement of the amount of resistance offered by an object to the flow of electric current. 1 volt of voltage applied across a 1 ohm resistance, will result in 1 ampere current flowing.
What is an object called that melts under high voltage to protect circuits?
A device that melts under high current , not high voltage is a circuit protective fuse. There are many fuses that are rated for voltages in the 10,000 volt range. It is the over current that trips them.
How is resistance related to electric currents?
Resistance affects how much current can flow; a higher resistance means either less current, or more voltage required for the same current. They are related in formula by V = IR, i.e. the product of resistance and current is the voltage across that component. Knowing any two allows you to work out the third. ANSWER REMOVING IMPIRICAL MAGNETUDES IT IS SIMPLY A RATIO 1:1:1
What voltage is needed to produce a 6 A current in an object that has a resistance of 3 ohm?
18 volts
What quantities are needed to calculate an object's resistance?
Voltage, current, or power. You need two out of the three.
If the voltage is 12 volts and the resistance is 3 ohms what are the amps in this circuit?
Using Ohm's law, we can find the current (I) in a circuit where 3 ohms is the resistance (R) and 12 volts is the appllied voltage (V). [(E) means energy]I = V / R = 12 / 3 = 4 amps.Visit this link http://www.csgnetwork.com/ohmslaw2.html for making Ohm's Law calculations.
How does a Digital Multi-Meter or DMM measure resistance?
A DMM measures resistance by passing a known current through the object you are measuring and reads the voltage. You can then calculate the resistance using the equation V=I*R. R=V/I So for 1mA and a return voltage of 1V the resistance must = 1 KOhm. R= 1/0.001 = 1000 Ohm
Can you burn stuff with an electrical current?
Yes, current flow through anything (except superconductors) always produces heat proportional to the square of the current, due to the resistance of the object. Enough current will produce enough heat at some point to burn...
What is resistance in science?
The act of resisting; opposition, passive or active., The quality of not yielding to force or external pressure; that power of a body which acts in opposition to the impulse or pressure of another, or which prevents the effect of another power; as, the resistance of the air to a body passing through it; the resistance of a target to projectiles., A means or method of resisting; that which resists., A certain hindrance or opposition to the passage of an electrical current or discharge offered by conducting bodies. It bears an inverse relation to the conductivity, -- good conductors having a small resistance, while poor conductors or insulators have a very high resistance. The unit of resistance is the ohm.
What is the meaning of Ohms?
Resistance is the measure of the degree to which an object will oppose an electric current. The SI unit for resistance is Ohm (Ω). Resistance can be found using the formula R=V/I where R=resistance (Ohms) V=the potential difference across the object (Volts) I=the current through the object (Amperes)
How is conductivity related to resistance?
It requires a force to propel an object through air, because of the air resistance. Normally, if there were no air resistance and the object were being propelled on the level with no friction, a constant force would accelerate the object steadily. However, it would require a steady force to propel the object through air even without acceleration. And the faster it went the more resistance it would meet.
What is the nature of the current voltage graph for an unknown resistor?
Fixed-value resistors are normally manufactured so that they obey Ohm's Law -that is, the ratio of their voltage to current remains constant for variations in voltage, within specified limits. In other words, their resistance value remains constant for variations in voltage. This would produce a straight-line curve when plotted. Devices and materials that do not obey Ohm's Law (e.g. semiconductors, etc.) would produce a curved line.
The ability of an object to resist current is called?
Resistance. And the object exhibiting this property is called a resistor.
What is resistance?
Resistance is the opposition to flow or movement.Resistance in a a mechanical system could be friction, wind, gravity.Resistance can be opposition to a policy, or to an invasion (e.g. French Resistance).Resistance in an electrical circuit is the limiting or opposition to current flow. It is measured in Ohms.----Electrical ResistanceThe technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms."In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current.We can predict the current in a given circuit using Ohms law:V = I x RWhere:V is Voltage (measured in Volts)I is current (measured in Amps)R is resistance (measured in Ohms)You will often see this in the form E = I x R. It is exactly the same thing, just a different convention where "E" is used for voltage instead of "V"Ohms law is:V=I/RV=Voltage (volts)I=Current (amps)R=Resistance (Ohms)Resistance in an AC circuit is called Impedance (Z)Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.----------Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.There are many different types of resistance, and I recommend that for starters you read up on the Wikipedia article on electrical resistance.http://en.wikipedia.org/wiki/Electrical_resistance
