Ohmic or Non-Ohmic? - Reasoning Explained

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The discussion concludes that the nichrome wire is non-ohmic because the graph of its voltage and current relationship is not linear. This indicates that the wire does not obey Ohm's Law, which requires a direct proportionality between voltage and current. Since the graph is not a straight line, the resistance of the wire changes with varying voltage and current. Ohm's Law specifically states that for ohmic materials, the voltage and current should produce a linear relationship. Therefore, the findings confirm the non-ohmic behavior of the nichrome wire.
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Does its resistance change?
 
What we found: The graph is not a straight line which shows that the nichrome wire does not obey Ohm's Law, that is, it is non-ohmic.
 
As the relationship is not linear, the graph is NON OHMIC.

Ohms law states that the Voltage (Potential Difference) and Current of a circuit are both DIRECTIONALLY PROPORTIONAL to each other - therefore a graph produced displaying the relationship between the two would be linear.

Hope this helps!
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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