The figure shows a network of currents. The values of the currents are shown in the figure. What is the value of current $I$ in $A$?

The galvanometer has no deflection and the length of wire $AB$ is $350 \, cm$. Then $AC$ equals to ............... $cm$.

The resistances of the four arms $P, Q, R$ and $S$ in a Wheatstone's bridge are $10 \, \Omega$, $30 \, \Omega$, $30 \, \Omega$ and $90 \, \Omega$, respectively. The e.m.f. and internal resistance of the cell are $7 \, V$ and $5 \, \Omega$ respectively. If the galvanometer resistance is $50 \, \Omega$, the current drawn from the cell will be ............... $A$.

Which of the following statements is false?

Find the current through the branch $ad$ of the circuit shown in the figure. (in $, A$)

The current flowing through the circuit shown in the figure is ............ $A$.