What is a current source? Don't give definition. I know it.
Battery is a voltage source. so what is a current source? transistors?
Battery is a voltage source. so what is a current source? transistors?
That would make a poor current source since the resistance is low. A current source has a very high (ideally infinite) output impedance.inductors passing through a magnetic field.
yes you helped. I am just wondering why current sources are used so frequently in circuit analysis when we don't have any good current source.Did I help at all?
Yeah very true but the internal resistance is parallel in current source to maximise the admittance to the outputA voltage source should have low internal resistance while a current source has high internal resistance.
How can you doubt the existence of something that has been produced many times? Like its voltage source counterpart, it cannot output more power than its own input receives. If a generator is spun at constant torque for constant current, the output voltage is determined by current source value times load resistance.yes you helped. I am just wondering why current sources are used so frequently in circuit analysis when we don't have any good current source.
I was confused because circuit analysis is laid on two basis laws
1) Law of conservation of energy
2) Law of conservation of charge.
If an ideal current source exist, then people would exploit it for producing large potential difference by connecting a large load across it. But as energy can't be created it's impossible to deliver infinite amount of energy.
so i doubt the existence of current source or any source which is close to it.
btw, lightening and the turbine which is allowed to spin at constant torque are good examples.
There are lots of very good current sources and they're used in practical designs all the time.I am just wondering why current sources are used so frequently in circuit analysis when we don't have any good current source.
If an ideal current source exist, then people would exploit it for producing large potential difference by connecting a large load across it. But as energy can't be created it's impossible to deliver infinite amount of energy.