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 $Y$.

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

 

In a metre bridge experiment, null point is obtained at $20 \mathrm{cm}$ from one end of the wire when resistance $X$ is balanced against another resistance $Y$. If $X<Y$, then there will be the new position of the null point from the same end, if one decides to balance a resistance of $4 X$ against $Y$

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:

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

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

In a Wheatstone bridge all the four arms have equal resistance $R$ . If the resistance of the galvanometer arm is also $R$ , the equivalent resistance of the combination as seen by the battery is

In a Wheatstone bridge, three resistances $P, Q \mathrm{a}\mathrm{n}\mathrm{d} R$ are connected in the three arms and the fourth arm is formed by two resistances $S_1 \mathrm{a}\mathrm{n}\mathrm{d} S_2$ connected in parallel. The condition for the bridge to be balanced will be

What shall be the reading in ammeter, when switch $S$ is closed?

For the network shown in the figure. The value of the current $i$ is

Five equal resistance each of resistance $R$ are connected as shown in the figure. A battery of $V$ volts is connected between $A$ and $B$. The current flowing in $AFCEB$ will be

In a Wheatstone's bridge all the four arms have equal resistance $R$. If the resistance of the galvanometer arm is also $R,$ the equivalent resistance of the combination as seen by the battery is