shaalaa.com | Current Electricity part 18 (Microscopic form of Ohms law)
Series 2: playing of 3
Figure , below shows the I-V characteristic curves for four resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer.
The graph between V and I for a conductor is a straight line passing through the origin.
What should remain constant in a statement of this law?
Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance?
A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply. Find the heat in joules produced by this combination of resistances in half a minute.
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
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