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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Solution

(a) The connections between the resistors in a meter bridge are made of thick copper strips because the resistivity of copper is very low and the resistance of the strips become almost negligible due to the large cross-sectional area of the thick connections.

(b) It is preferred to obtain the balance point in the middle of the meter bridge wire because it improves the sensitivity of the meter bridge.

(c) Alloys like Constantan and Manganin are used for meter bridge wire because of their low temperature coefficient of resistance and high resistivity.

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Q. (a) Why are the connections between the resistor 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 bride wire?
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Q. 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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(a) In a metre bridge [Fig. 3.27], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Ω. Determine the resistance of X. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?

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Q. (a) In a meter bridge [Fig. 3.27], the balance point is found to be at39.5 cm from the end A, when the resistor Y is of 12.5 W.Determine the resistance of X. Why are the connections betweenresistors in a Wheatstone or meter bridge made of thick copperstrips? (b) Determine the balance point of the bridge above if X and Y areinterchanged.(c) What happens if the galvanometer and cell are interchanged atthe balance point of the bridge? Would the galvanometer showany current?

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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?

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?