# physics

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#1
HI everyone,
Can anyone explain 2 me, quickly and simply, in one sentance, wot resistance is?
Thanx, i need 2 no 4 my gcse cw.
Thanx
0
17 years ago
#2
HI everyone,
Can anyone explain 2 me, quickly and simply, in one sentance, wot resistance is?
Thanx, i need 2 no 4 my gcse cw.
Thanx
resistence is the constant of proportionality between potential difference and current in an ohmic conductor
0
17 years ago
#3
(Original post by elpaw)
resistence is the constant of proportionality between potential difference and current in an ohmic conductor
I know it's quite simple, but do you think he'll understand that?
0
17 years ago
#4
Or we could say, more simply, components in a circuit resist the flow of current through them. The greater the resistance, the smaller the current that flows for a particulkar voltage.

R = V/I
0
17 years ago
#5
(Original post by elpaw)
resistence is the constant of proportionality between potential difference and current in an ohmic conductor

It depends for what you wish to use it...

Resistance is anything that slow or stops movement or keeps movement from happening.

For a space ship, resistance will counter the thrust of a rocket and keep the rocket from going as fast as it could. Once the ship is out of the Earth's atmosphere and gravitational pull, resistance will drop off considerably.

Examples of resistance to motion on Earth include: air resistance slowing a parachutist's fall; resistance of friction slowing or stopping a book from sliding across a rug or a desk; and gravity resisting something traveling upwards or keeping something on the ground. There is also electrical resistance, which slows or stops electrical current, often transforming that energy into heat or light.
0
17 years ago
#6
Dumbed down simply, Resistance is a measure of the opposition to electric current
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