Recent content by Eisen

Anyone?

Here's the circuit- It isn't clear to me which part of this circuit makes the voltage divider and also it doesn't show where the voltage output is on the circuit. Can someone tell me those two things please. Also I don't understand why voltage increases as resistance increases in the LDR...

So does the voltage through the whole circuit drop down to 20v?

Anyone?

Here is the circuit- Can someone please tell me why the lamp will always have a voltage of 20v across it no matter how high the voltage is? Doesn't the zener diode allow voltage through it after 20v? So then only the voltage after 20v has been dropped should go through the lamp right? For...

Thanks, well that clears things up for me.

So the voltage drop through resistor 2 is the same as in the diode because they are in parallel?

I don't see why the voltage drop across R2 and the diode would be the same.

This isn't a homework question but it is a formula from a book I have been using to study, so I'm posting it here. Here is the circuit and formula - I don't understand why the voltage drop of 0.7 volts across the diode is being used as part of the formula to work out the current...

Thanks for your replies, I am continuing to investigate electromagnetic induction.

[SIZE="1"]Originally Posted by Eisen [SIZE="1"]Originally Posted by NascentOxygen Ask the creator, you mean God? Come on, surely one of the mere mortals on here has the answer? :biggrin: But seriously though, isn't there a theory to explain this?

I haven't got an answer yet, can someone please reply with an answer?

Why does cutting the lines of the magnetic field cause electrons in the copper wire to be deflected in the right direction? When the wire goes through the magnet it is at a right angle to the magnetic field- See what I mean? So how do the electrons get pushed up vertically by a magnetic...

Can someone please tell me why the magnetic field makes the electrons flow round the coil in a generator? Does the force of the magnetic field have to go in the same direction as the coil?