Why are the connecting resistors in a meter bridge made of thick copper strips ?
Text Solution
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The thick copper strips are used for connecting resistors as they offer minimum resistance and hence avoid error due to end resistance. The same (i.e., error due to end resistance) has not been taken into account in the bridge formula
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Answer the following : (a) Why are the connections between the resistors in a meter bridge made of thick copper strips? (b) Why is it generally preferred to obtain the balance point in the middle of the meter bridge wire? ( c) Which material is used for the meter bridge wire and why?
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(i) In a metre bridge, the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Omega . Determine the resistance of X. Made of thick copper strips? (ii). Determine the balance point of the bridge above if X and Y are interchanged. (iii). what happens if the galvanometer and cell are interchanged at the balance point of the bridge ? Would the galvanometer show any current?
Make the appropriate connection in the meter bridge set up shown. Resistance box is connected between____. Unknown resistance is connected between_____. Battery is connected between_______.
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