# gcse aqa physics

can anyone please explain what happens to the p.d and current if resistance increases, i really don't get it and i keep seeing different answers. and is it different based on whether its an ohmic conductor?
In an ohmic conductor, the temp is constant so the p.d and current are directly proportional ( when one increases the other increases) so the resistance is constant ( because the electrons don’t have a change in kinetic energy for more/ less collisions with the ions in the wire), but in for example a bulb when the current increases the temp increases so the resistance increases because the electrons in the wire have more kinetic energy ( from temp) and collide more often with the ions in the wire.
so the pd and current decrease
Original post by nmaaa
In an ohmic conductor, the temp is constant so the p.d and current are directly proportional ( when one increases the other increases) so the resistance is constant ( because the electrons don’t have a change in kinetic energy for more/ less collisions with the ions in the wire), but in for example a bulb when the current increases the temp increases so the resistance increases because the electrons in the wire have more kinetic energy ( from temp) and collide more often with the ions in the wire.

okay thank you so so much! also, sorry to be annoying, but i just have another question. if you add a voltmeter to a series circuit does it become a parallel circuit and the whole circuit follows the rules for a parallel circuit? and in a parallel circuit, if components are connected in series in a branch does the p.d split?
thank you
Original post by jajahjhajhsja
okay thank you so so much! also, sorry to be annoying, but i just have another question. if you add a voltmeter to a series circuit does it become a parallel circuit and the whole circuit follows the rules for a parallel circuit? and in a parallel circuit, if components are connected in series in a branch does the p.d split?
thank you

the whole circuit does not become a parallel circuit as the voltmeter is only used to read the voltage of a component in a circuit, the circuit will still follow the rules of a series circuit.
Original post by jajahjhajhsja
okay thank you so so much! also, sorry to be annoying, but i just have another question. if you add a voltmeter to a series circuit does it become a parallel circuit and the whole circuit follows the rules for a parallel circuit? and in a parallel circuit, if components are connected in series in a branch does the p.d split?
thank you

in a parallel circuit the voltage (p.d) is the same everywhere it is only the current that splits equally at each branch
Original post by Tiya..x
the whole circuit does not become a parallel circuit as the voltmeter is only used to read the voltage of a component in a circuit, the circuit will still follow the rules of a series circuit.

honestly thank you soooo much !!! that's so helpful