meter bridge

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?

In the circuit a meter bridge a shown in the balanced state .The meter bridge wire has a resistance of 1 Omega //cm . Calculate the unknown resistance Y and the current drawn from the battery of negiligible internal resistance

In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance .1 ohm//cm . The value of unknown resistance X and the current drawn from the battery of negligible resistance is

When two known resistance R and S are connected in the left and right gaps of a meter bridge, the balance point is found at a distance l_(1) from the zero end of the meter bridge wire. An unknown resistance X is now connected in parallel to the resistance S and the balance point is found at a distance l_(2) from the zero end of the meter bridge wire, Obtain a formula for X in terms of l_(1), l_(2) and S.

In a meter bridge experiment two unknown resistance X and y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 20 cm from right (XgtY) the new position of the null point from left if one decides balance a resistance of 4 X against Y.