Wheatstone and Meter Bridge

In a meter bridge balance point is found at a distance  $l_1$  with resistances R and S as shown in the figure.



When an unknown resistance X is connected in parallel with the resistance S, the balance point shifts to a distance $l_2$ . Find the expression for X in terms of  $l_1$ ,  $l_2$  and S.

The magnitude of resistance $\mathrm{X}$  in the circuit shown in the given figure, when no current flows through the  $\mathrm{5 }\mathrm{\Omega }$  resistor is

The percentage error in measuring resistance with a meter bridge can be minimised by adjusting the balancing point close to

A battery of $6 \mathrm{V}$ is connected to the circuit as shown below. The current $I$ drawn from the battery is

The current $I$ in the given circuit will be

The voltage sensitivity of a galvanometer is given by-

Sensitivity is expressed in 

Amount of deflection of the galvanometer depends on _____.

When the bridge is balanced, what is the current flowing through the galvanometer?

The figure given below shows a network of eight resistors, each equal to $2 \mathrm{\Omega },$ connected to a $3 \mathrm{V}$ battery of negligible internal resistance. The current $I$ in the circuit is 

Find the equivalent resistance between $X$ and $Y$.

$AB$ and $CD$ are two uniform resistance wire of lengths $100 \mathrm{cm}$ and $80 \mathrm{cm}$ respectively. The connections are shown in the figure. The cell of emf $5 \mathrm{V}$ is ideal while the other cell of emf $E$ has internal resistance $2 \mathrm{\Omega }.$ A length of $20 \mathrm{cm}$ of wire $CD$ is balanced by $40 \mathrm{cm}$ of wire $AB\mathit{.}$ Find emf in volt, if the reading of the ideal ammeter is $2 \mathrm{A}.$ The other connecting wires have negligible resistance.

The effective resistance between $\mathrm{A}$ and $\mathrm{B}$ is

If the wire in the experiment to determine the resistivity of a material using metre bridge is replaced by copper or hollow wire the balance point i.e. null point shifts to

Null method is superior over deflection method because

As shown in the figure below, a cube is formed with ten identical resistance $R$ (thick lines) and two shorting wires (dotted lines) along the arms $AC$ and $BD$.

The resistance between points $A$ and $B$ is

Figure $\left(\mathrm{a}\right)$ below shows a Wheatstone bridge in which $P,Q,R,S$ are fixed resistances, $G$ is a galvanometer and $B$ is a battery. For this particular case, the galvanometer shows zero deflection. Now, only the positions of $B$ and $G$ are interchanged, as shown in figure $\left(\mathrm{b}\right)$. The new deflection of the galvanometer-

Where do we get the balancing point of the meter bridge generally?

The null method is superior to deflection method because 

Find the equivalent resistance between $X$ and $Y$.