Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship
V = I x R
where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.
Current is the effect (voltage being the cause). Current cannot flow without Voltage.
Voltage is the cause and current is its effect. Voltage can exist without current.
yup v=i*r
where v- voltage
i current
r is resistence of wire/conductor/anything through which current passes
this is only for device having constant voltage as a result they have constant current
and all metals have a constant resistence so no worry whether resistence is constant or not
Yes.
Find out.
