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True or false current is the voltage multiplied by the resistance?
Wiki User
∙ 12y ago
False. Voltage (E) is the potential difference, i.e. electrical potential, in joules per coulomb. Current (I), on the other hand, is electrical charge flow, in coulombs per second. The two units are not related except through a common term such as resistance (R).
E = IR
I = E/R
R = E/I
Wiki User
∙ 12y ago
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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.
In RC circuits the voltage leads the current?
Inductive. Used to remember this by "Eli" the "ice" man. "(e) Voltage (l) (Inductive circuit) (i) current", the ,"(i) Current (c) (capacitive circuit) (e) voltage, man.
Why do you connect galvanometer in series?
You connect a galvanometer in series with the circuit being measured, because the galvanometer is a form of ammeter, although an extremely sensitive one, and ammeters measure the current in a series circuit.
Current will flow as long as the power supply is good and there's a power-control device true or false?
Current will flow as long as there is a difference of potential (a voltage) and a path for current to flow. So no power-control device is required for current flow but yes it will flow with a power control decive.
Is Resistance is a BATTLE OF WITS with your captor.?
False
Is Ohm's law states that voltage in a circuit is equal to resistance times current true or false?
True. Ohm's law states the voltage is resistance times current.
When electric current is following in a curcuit if the voltage applied to the curcuit is increased the resistance will decrease true or false?
true
True or false ohm's law asserts that the current in a conducting wire is proportional to the resistance of the wire?
It's true, but only for a constant applied voltage. It turns out that the current in that wire is also proportional to the voltage applied to the circuit. Here's how it works.For a given applied voltage, current is (inversely) proportional to resistance. More resistance (for that same applied voltage) makes for less current will flow. Less resistance (for that same applied voltage) means more current will flow. We say that current and resistance are proportional because for a given voltage, when one goes up by "X" amount, the other goes down by the same proportion. Double the resistance, current is cut in half. Ten times the resistance will allow only one tenth the current. And we say inversely, because the change is in the "other" direction. When current goes up, resistance must have gone down (for that same applied voltage). Here's the other half of the idea with current and voltage and a given value of resistance.In a circuit with a fixed resistance, more voltage will drive more current. Less voltage will drive less current. They're directly proportional. That means if you double the voltage, you'll get double the current (through the same resistor). If you cut the voltage by a factor or ten (one tenth the applied voltage), you'll end up reducing current by a factor of ten (one tenth the current) for that same resistor. We usually think of circuits this way, but we can also think of them in other ways according to Ohm's law. Let's summarize.Voltage (E) is expressed in volts (V), and current (I) is expressed in amps (A), and resistance (R) is expressed in ohms (upper case omega).E = I x R (E equals I times R)R = E / I (R equals E divided by I)I = E / R (I equals E divided by R)AnswerFalse. Ohm's Law, in essence, states that the ratio of voltage to current is constant for variations in voltage. No mention of resistance whatsoever! However, for those materials that obey Ohm's Law ('linear' or 'ohmic'), raising a conductor's resistance will cause the current to fall (assuming the voltage is fixed). so the current must be INVERSELY proportional (not proportional) to the resistance!
Is an electric voltage a varying electric current that reprsents information?
false
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.
In RC circuits the voltage leads the current?
Inductive. Used to remember this by "Eli" the "ice" man. "(e) Voltage (l) (Inductive circuit) (i) current", the ,"(i) Current (c) (capacitive circuit) (e) voltage, man.
Resistance training requires the use of heavy resistance?
If it is a true or false question your answer is: False. :)
True or False - The primary job of the distributor is to convert low voltage to high voltage?
false
True or false if the voltage and resistance of a circuit stay constant the amperage can never change?
The equation for the three values in the question will give the definite answer.Amperage (I) is equal to the voltage (E) divided by the resistance (R).I= E / R So as you can see the answer is True.Example: 10 Volts and 50 Ohms in a circuit will have a current of .2 Amperes flowing through it. 10 / 50 = .2You can also rearrange the equation to find the other two:E= R * ER= E / I
True or false ohm's law describes the electrical properties of some conducting materials?
True: Resistance R = voltage V / amperage IResistance is the conducting material.
When you abuse alcohol your resistance to colds increases?
That is false.
Why do you connect galvanometer in series?
You connect a galvanometer in series with the circuit being measured, because the galvanometer is a form of ammeter, although an extremely sensitive one, and ammeters measure the current in a series circuit.
