Which has the greatest resistance, a metre of wire with 1mm, 2mm or 4mm diameter?
Which has the greatest resistance a wire 0.5m, 1m or 2m long of the same type and thickness?
If a piece of wire with a high resistance is connected in series with a torch bulb in a circuit what happens to the brightness of the bulb?
Why do metals have electrical resistance?
Ohm's law is?
A piece of wire connected to a 6V cell has a current of 1.5A flowing through it. What is the resistance of the wire?
A wire with a resistance of 10 Ω is connected to a 12 V supply. What is the current flowing through it?
What is the voltage difference across a piece of wire of resistance 100 Ω with a current of 20 mA flowing through it?
The following graph represents?