Four resistance 10$\Omega$, 5$\Omega$, 7$\Omega$ and 3$\Omega$ are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of 10$\Omega$ is connected across the diagonal AC. The equivalent resistance between A and B is

Q. Four resistances $10\Omega ,5\Omega ,7\Omega$ and $3\Omega$ are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of $10\Omega$ is connected across the diagonal AC. The equivalent resistance between A and B is

Q. Four resistances of $15\Omega ,12\Omega ,4\Omega$ and $10\Omega$ respectively in cyclic order to form Wheatstone's network. The resistance that is to be connected in parallel with the resistance of $10\Omega$ to balance the network is _____ $\Omega$.

Q. Two resistances 10$\Omega$and 15$\Omega$are connected in series. A cell of e.m.f. 1.5V of negligible resistance is connected between their ends. Then
a) current flowing through 15$\Omega$resistance is 60mA
b) P.d across 10$\Omega$resistance 0.9V
c) P.d across 15$\Omega$resistance is 0.9V
d) resultant resistance is 6$\Omega$

Q. Four resistances $10\Omega ,5\Omega ,7\Omega$ and $3\Omega$ are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of $10\Omega$ is connected across the diagonal AC. The equivalent resistance between A and B is

Q. Two wires of resistances 10 $\Omega$ and 5 $\Omega$ are connected in series. The effective resistances is _______ $\Omega$