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प्रश्न
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
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उत्तर
Bends in the wire will not affect its resistance. This is because the electrons are extremely small in size as compared to the bends. So, the electrons can easily change their direction of motion.
संबंधित प्रश्न
The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B. represents the parallel combination? Give reasons for your answer.
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
How does the resistance of an alloy, vary with temperature?
Name the material of wire used for making standard resistances. Give a reason.
How does the resistivity of a semiconductor depend on temperature?
State expression for Resistance connected in series.
State expression for Cells connected in parallel.
What is the maximum resistance which can be made using five resistors each of `1/5` W?
