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प्रश्न
How does the resistance of an alloy, vary with temperature?
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उत्तर
The resistance of an alloy remains nearly unaffected by the change in temperatue.
संबंधित प्रश्न
Why is the series arrangement not used for domestic circuits?
Write any two characteristics of a series combination of resistors.
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
How does the resistance of a pure metal change if its temperature decreases?
What is the equivalent resistance between A and B in the given circuit (Fig?)

Answer the following question.
While studying the dependence of potential difference ( V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and t. He got a straight line graph passing through the origin. What does the straight-line signify? Write the method of determining the resistance of the resister using this graph.
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Three resistors of 6Ω, 3Ω and 2Ω are connected together so that their total resistance is greater than 6Ω but less than 8Ω Draw a diagram to show this arrangement and calculate its total resistance.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
