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प्रश्न
Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.
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उत्तर
The diagram indicates a square ABCD formed by joining four resistances of 2Ω each, end to end.
Let us calculate the equivalent resistance of the combination B between the two adjacent comets C and D.
From given figure, arms DA, AB and BC are joined in series.
So, their equivalent of 6Ω and 2Ω are in parallel.
∴ The equivalent resistance of the combination is R.
Then, `1/"R" = 1/6 + 1/2 = 4/6 = 2/3`
∴ R = `3/2` Ω
= 1.5 Ω
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संबंधित प्रश्न
Complete the following :-
(a)
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
How does the resistance of a wire change when:
its length is tripled?
Draw a V-I graph for a conductor at two different temperatures. What conclusion do you draw from your graph for the variation of resistance of conductor with temperature?
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.
Define the term resistivity and state its S.I. unit. Which will have higher resistivity a conductor or an insulator.
State and explain the laws of resistance.
What is the maximum resistance which can be made using five resistors each of `1/5` W?
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
