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What is the current through a 4 and 8 ohm resister in sereis with 12 volts across both resisters?
Wiki User
∙ 14y ago
Total resistance (thevinen resistance) = 4 + 8
Total voltage = 12 volts.
Ohms law: I = V / R
Therefore I = 12/12 = 1 amp.
Wiki User
∙ 14y ago
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Why the net resistance increases in series connection?
series network consists of components i.e resisters connected end to end. since their is only one path for the flow of current. but potential drop across each resister is different. so thats the reason that series network has maximum resistence then the highest resister in combination. the same amount of current passes through each resister.
What happen to current when paralle resistor added?
For the individual resistor, the current is constant, regardless of any other resister that's attached to it in parallel. The current that results from all the resistors combined decreases as the resistance of one or more of the resistors increases.
Watt is the current allowed to flow through a bulb?
The current flowing through a bulb is equal to the (voltage across the bulb) divided by the (bulb resistance), and can be expressed in Amperes. The rate at which the bulb dissipates energy is equal to (voltage across the bulb) times (current through the bulb), and can be expressed in watts.
How measure the value of resister?
To measure the value of a resistor, apply a voltage and measure the voltage across the resistor and the current through the resistor. Use Ohm's law: Resistance equals Voltage divided by Current. Start with a small voltage and increase gradually until a reading is obtained, but be careful that the power dissipation (watts = volts times amperes) of the resistor is not exceeded. Simpler solution: Use an ohmeter.
A resistance of 10 ohms is placed across a 9 volt battery what current flows through the battery?
No current flows through the battery. There is a current through the external circuit. I = E/R = 9/10 = 0.9 amperes.
Why the net resistance increases in series connection?
series network consists of components i.e resisters connected end to end. since their is only one path for the flow of current. but potential drop across each resister is different. so thats the reason that series network has maximum resistence then the highest resister in combination. the same amount of current passes through each resister.
Why load resister is conected across the circuits?
Load resistors are connected across the circuit to limit the current flowing through the load.
What is a 1.5 omega resister?
The capital Greek letter Ω (omega) is the symbol for Ohms - the unit of resistance. A 1.5Ω resister is a resistor with quite a low resistance. If a voltage of 1.5 Volts is applied across it, a current of 1 Amp[ere]s will flow through it.
What should the current be through a bleeder resister in a voltage divider circuit?
The current should be high enough to maintain the voltage at each division. Generally, the current should be ten times the load current or the voltage will be across the voltage divider. If possible use regulators or zeners or regular diodes. I'm not saying dividers are bad but there are less current sensitive solutions.
What is leakage resistance?
leakage resistance of a resister is type of fault which occurs at a specific voltage across the resister which are undertesting.
Why is heat generated across a resister when electric field is applied?
An electric current contains energy; so does an electric field. When a current flows through a resistor, part of the electrical energy will be wasted - i.e., converted to heat. You can think of this as if some of the electrons crash into atoms, instead of continuing on their way.
Do You measure current across a circuit?
A current flows through, not across, a circuit. And, yes, you can measure it using an ammeter.
Is current is drop when it flowing through the resistor?
Current flows in loops, voltage drops across elements. With relation to current, what flows in, must flow out, so no, current is not dropped across a resistor, it flows through a resistor and voltage is dropped across the resistor.
Does voltage flow across or through a resistor?
No. If a voltage is applied across a resistor, a current flows through it.
How ampere meter works?
Amperes of electrical current is analogous to pressure of water in a water pipe. The higher the "water pressure", the higher the amperage. An Ammeter ("amperage meter") measures "the water pressure" (the pressure of electrical current).I use to teach Electronic Theory to Armature/Ham Radio operators and to computer techs at one company. So I can recite this suff in my sleep.It depends on the kind of Ammeter you are talking about. There is one used for AC/alternating current and another for DC/Direct current. In DC measurements there is one or more resisters inside the meter. Usually precision resisters measuring less than an ohm. The meter measures the voltage drop across that resister and using the formula current(I) equals voltage(E) divided by resistance(R). It calculates current. Again this is for DC measurements This all comes from Ohms law. There are strict current limits for these meters too. For measuring High current you usually have to buy a special meter or a very accurate meter and an expensive & very accurate resister that looks like a copper bar. Also to protect this measurement circuit in the meters there is usually a fuse or the like Also many if not most meters have to be hooked up red to positive and black to negative. There may also be a diode or something to protect the meter from being hooking it up wrong. It will blow the fuse if you hook it up backwards. Warning! When measuring HIGH CURRENT the resisters get very hot rule of thumb the bigger the resister the hotter it gets.For AC current measurement there is a ring on the meter that can open and reconnect around the AC wiring. There it does a similar measurement using an Inductive connection rather than a direct connection. This is the easiest way to measure an inductive load also.Hope this helps.
When does current flow through a conductor?
When a voltage is applied across it.
When a 12 V battery is connected across an unknown resister there is a current of 2.5 mA in the circuit find the value of the resistance of the resistor?
Resistance = voltage / current = 12V / 2.5mA = 12V / (2.5 x 10-3 A) = 4.8 x 103 ohm
