Wheatstone Bridge

Figure shows an unbalanced Wheatstone bridge. What is the direction of conventional current between $B$ and $D$?

If the central resistance is $15 \mathrm{\Omega }$, then the equivalent resistance between $A$ and $B$ will be

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

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-

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

The effective resistance between points P and Q of the electrical circuit as shown in the figure is

 

What is the value of $R$ in Ohms such that the current in the galvanometer is zero?

In the arrangement of resistances shown below, the effective resistance between points $A$ and $B$ is

Find the equivalent resistance between the points $A$ and $B :-$

In a Wheatstone bridge the branch resistances are as shown in the following circuit diagram. What will be the value of $X$ in balancing the condition of the Wheatstone bridge?

What will be the value of resistance $R$ for the network shown in the figure so that the current in ammeter may be zero.

On interchanging the position of battery and galvanometer in Wheatstone bridge respectively the new balance point:

In the circuit shown in figure, the cell is ideal with emf $9 \mathrm{V}$. If the resistance of the coil of galvanometer is $1 \mathrm{\Omega }$, then

Resistance $P\mathit{,}Q\mathit{,} S$ and $R$ are arranged in a cyclic order to form a balanced Wheatstone’s network. The ratio of power consumed in the branches $\mathit{(}P\mathit{+}Q\mathit{)}$ and $\mathit{(}R\mathit{+}S\mathit{)}$ is:

In a Wheatstone network, $P=2\mathrm{ }\mathrm{\Omega },\mathrm{ }Q=2\mathrm{ }\mathrm{\Omega },\mathrm{ }R=2\mathrm{ }\mathrm{\Omega }\mathrm{ }$ and $S=3\mathrm{ }\mathrm{\Omega }$. The resistance with which $S$ is to be shunted in order that the bridge may be balanced is

Find current $i$ in circuit shown in figure.

Four resistances $P,Q,R$ and $X$ formed a Wheatstone bridge. The bridge is balanced when $R=100$ ohm. If $P$ans $Q$ are interchanged then  bridge is balanced for  $R=$$121$ ohm. The value of $X$ is

The effective resistance between points $P$ and $Q$ of the electrical circuit shown in the figure is,

Assertion: In a meter bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.

Reason: Resistance of a metal increases with increase in temperature.