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In order to induce a voltage into the secondary winding of a transformer, there must be a continuously-changing magnetic flux within the magnetic circuit (core) linking the secondary and primary windings. This is only possible if the primary current is also changing -hence the reason why Transformers require an a.c. supply.
There is an exception to this rule -an automobile's ignition coil is a transformer, supplied from the battery -i.e. a d.c. source. But to provide a changing flux, the d.c. current in the primary winding must be continously switched on and off -in older vehicles, this was done by the contact-breaker driven by the distributor.
What else can I help you with?
What type of electric current does a power plant generate for use in your home?
generally power plants produce ALTERNATING CURRENT,because after producing the current the are sent to substations where they are stepped up or stepped down.so a transformer is mainly used over there.for a transformer we cant supply direct current.we should supply only alternating current.so they only produce alternating current................... 4RM PRAJITH
How is a DC waveform produced from the output terminals of a DC generator?
A DC waveform is produced from the output terminals of a DC generator through the action of a commutator, which converts the alternating current induced in the armature windings into direct current by reversing the direction of current flow at the appropriate times. As the armature rotates within the magnetic field, the commutator ensures that the output current remains unidirectional, resulting in a DC waveform at the generator terminals.
How do you convert Hz to Watts?
Hz (hertz) and watts are different units of measurement. Hz measures frequency while watts measure power. You cannot directly convert Hz to watts without additional information about the system such as voltage or current.
What does not conduct heat or electric current?
hmmm i also have the same question but i cant find it.
Will a twelve volt battery run 300 watts?
In principle a twelve volt battery (or battery of any voltage) can run a 300 watts load (or any load). However, there are practical problems. As we know, Power = Voltage x Current . Hence, a 300 watts load at 12 V will require a current of 300/12 = 25 A. To carry a 25 A current a conductor of very large cross sectional area will be required. Apart from the practical problem of handling such a thick cable, the cost considerations rule out this option because the cost of such a cable will be much larger than the additional cost of a higher voltage battery. A # 10 copper wire will carry 30 amps.
Why cant you use a transformer to increase the voltage of a 60V solar panel?
The output of a solar panel is direct current. Transformers need alternating current to operate.
Why you cant use step up transformer for step down purpose?
You can, providing you observe the voltage ratings of the windings.
The amount of current in a circuit can what by increasing the amount of resistance present in the circuit?
No it cant. Voltage = Current x Resistance. So at constant Voltage if the Resistance is increased, Current will reduce
What type of electric current does a power plant generate for use in your home?
generally power plants produce ALTERNATING CURRENT,because after producing the current the are sent to substations where they are stepped up or stepped down.so a transformer is mainly used over there.for a transformer we cant supply direct current.we should supply only alternating current.so they only produce alternating current................... 4RM PRAJITH
Why two voltage sources of different voltages cant be connected in parallel and what happened when you connect them?
The higher voltage source forces current backwards into the lower voltage source, which can damage it or even cause it to explode.
What happens when DC supply applied in to the power transformer?
we cant give dc supply to a transformer because it will have some constant frequency to work..Dc is not having any frequency component.Comment:Nothing will happen. Transformer works on the principal of electromagnetic induction were an alternating magnetic flux of the primary winding links up with secondary winding via the core. An emf will then be induced in the secondary winding if it's cut by the alternating flux. Only AC can attain this. DC does change directions and hence it won't effect anything.AnswerIf the value of d.c. voltage is equivalent to the transformer's rated primary voltage, then it's very likely that the primary winding will burn out as it has a very low resistance and the resulting current would be high.
How do you take transformer from water in Pokemon gold?
you cant
Which type of current does lightning has?
unfortunatley i cant tell for sure what you mean because of the lack of grammer (not insalting you) but if your asking wether it has direct current (DC) or alternating current (AC) like i think you are than the answer is direct current (DC)
Why cant a 18V battery be used as the input of a transformer?
The transformer needs AC at its input. The battery provides DC.
How do you wire computer fan into car amplifier?
Cant. Fan on computer runs on house current (power) which is AC and the car has a DC (direct current) power system.
Why voltage across capacitor cant change instantaneously?
Capacitors resist change in voltage. By definition, the equation is dv/dt = i/c, or rate of change of voltage in volts per second is current in amps divided by capacitance in farads. In order for the voltage to change instantaneously, then dv/dt must be infinity, which means i/c is also infinity. If capacitance is non-zero, then current must be infinity. Since there is no perfect voltage source, or no resistor or wire with perfect zero ohms, then it is impossible to have an infinite current, so it is impossible for the voltage across a capacitor to change instantaneously.
What is hi-pot test in mv cables?
with a voltage source and a current meter and log log paper. (hi-pot tester) plot the voltage vs the current when the line starts to bend or knee you are close to the failure voltage
